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Shanthikumar S, Gower WA, Srinivasan S, Rayment JH, Robinson PD, Bracken J, Stone A, Das S, Barochia A, Charbek E, Tamae-Kakazu M, Reardon EE, Abts M, Blinman T, Calvo C, Cheng PC, Cole TS, Cooke KR, Davies SM, De A, Gross J, Mechinaud F, Sheshadri A, Siddaiah R, Teusink-Cross A, Towe CT, Walkup LL, Yanik GA, Bergeron A, Casey A, Deterding RR, Liptzin DR, Schultz KR, Iyer NP, Goldfarb S. Detection of Bronchiolitis Obliterans Syndrome after Pediatric Hematopoietic Stem Cell Transplantation: An Official American Thoracic Society Clinical Practice Guideline. Am J Respir Crit Care Med 2024; 210:262-280. [PMID: 38889365 DOI: 10.1164/rccm.202406-1117st] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Accepted: 06/18/2024] [Indexed: 06/20/2024] Open
Abstract
Background: Many children undergo allogeneic hematopoietic stem cell transplantation (HSCT) for the treatment of malignant and nonmalignant conditions. Unfortunately, pulmonary complications occur frequently post-HSCT, with bronchiolitis obliterans syndrome (BOS) being the most common noninfectious pulmonary complication. Current international guidelines contain conflicting recommendations regarding post-HSCT surveillance for BOS, and a recent NIH workshop highlighted the need for a standardized approach to post-HSCT monitoring. As such, this guideline provides an evidence-based approach to detection of post-HSCT BOS in children. Methods: A multinational, multidisciplinary panel of experts identified six questions regarding surveillance for, and evaluation of, post-HSCT BOS in children. A systematic review of the literature was undertaken to answer each question. The Grading of Recommendations, Assessment, Development, and Evaluation approach was used to rate the quality of evidence and the strength of recommendations. Results: The panel members considered the strength of each recommendation and evaluated the benefits and risks of applying the intervention. In formulating the recommendations, the panel considered patient and caregiver values, the cost of care, and feasibility. Recommendations addressing the role of screening pulmonary function testing and diagnostic tests in children with suspected post-HSCT BOS were made. Following a Delphi process, new diagnostic criteria for pediatric post-HSCT BOS were also proposed. Conclusions: This document provides an evidence-based approach to the detection of post-HSCT BOS in children while also highlighting considerations for the implementation of each recommendation. Further, the document describes important areas for future research.
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Houdouin V, Dubus JC, Crepon SG, Rialland F, Bruno B, Jubert C, Reix P, Pasquet M, Paillard C, Adjaoud D, Schweitzer C, Le Bourgeois M, Pages J, Yacoubi A, Dalle JH, Bergeron A, Delclaux C. Late-onset pulmonary complications following allogeneic hematopoietic cell transplantation in pediatric patients: a prospective multicenter study. Bone Marrow Transplant 2024; 59:858-866. [PMID: 38454132 DOI: 10.1038/s41409-024-02258-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 02/24/2024] [Accepted: 02/28/2024] [Indexed: 03/09/2024]
Abstract
The primary objective of our multicenter prospective study was to describe the incidence of late-onset non-infectious pulmonary complications (LONIPCs) in children undergoing hematopoietic cell transplantation (HCT) using sensitive criteria for pulmonary function test (PFT) abnormalities including the non-specific pattern of airflow obstruction. Secondary objectives were to assess the factors associated with LONIPC occurrence and the sensitivity of the 2014 NIH-Consensus Criteria of bronchiolitis obliterans syndrome (BOS). PFT and clinical assessment were performed prior to HCT and at 6, 12, 24, and 36 months post-HCT. LONIPC diagnosis was validated by an Adjudication Committee. The study comprised 292 children from 12 centers. Thirty-two individuals (11%, 95% CI: 8-15%) experienced 35 LONIPCs: 25 BOS, 4 interstitial lung diseases, 4 organizing pneumonia and 2 pulmonary veno-occlusive diseases. PFT abnormalities were obstructive defects (FEV1/FVC z-score < -1.645; n = 12), restrictive defects (TLC < 80% predicted, FEV1 and FVC z-scores < -1.645; n = 7) and non-specific pattern (FEV1 and FVC z-score< -1.645, FEV1/FVC z-score > -1.645, and TLC > 80% predicted; n = 8). HCT for malignant disease was the only factor associated with LONIPC (P = 0.04). The 2014 NIH-Consensus Criteria would only diagnose 8/25 participants (32%) as having BOS. In conclusion, 11% of children experienced a LONIPC in a prospective design. Clinical Trials.gov identifier (NCT number): NCT02032381.
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Affiliation(s)
- Véronique Houdouin
- Université de Paris Cité, AP-HP, Hôpital Robert Debré, Service de Pneumopédiatrie, RESPIRARE, INSERM U976, Paris, France.
| | - Jean Christophe Dubus
- Université Aix-Marseille, AP-HM, Hôpital universitaire Timone-Enfants, Service de Pneumopédiatrie, MEPHI, Méditerranée-Infection, Marseille, France
| | - Sophie Guilmin Crepon
- AP-HP, Hôpital Robert Debré, Unité d'Epidémiologie Clinique, Inserm, CIC-EC 1426, Paris, France
| | - Fanny Rialland
- Hôpital de la mère et l'enfant, Service d'hématologie pédiatrique, Nantes, France
| | - Bénedicte Bruno
- Hôpital Jeanne de Flandre, Service d'hématologie pédiatrique, Lille, France
| | - Charlotte Jubert
- Centre hospitalo-universitaire de Bordeaux, Service d'hématologie pédiatrique, Bordeaux, France
| | - Philippe Reix
- Université Lyon 1, Hôpital Femme Mère Enfant, Service de pneumologie, allergologie, mucoviscidose, CNRS, Laboratoire de Biométrie et biologie Evolutive UMR, 5558, Villeurbanne, France
| | - Marlène Pasquet
- Centre hospitalo-universitaire de Toulouse Purpan, Hôpital des enfants, Service d'immuno-hémato-oncologie pédiatrique, INSERM U1037, Toulouse, France
| | - Catherine Paillard
- Centre hospitalo-universitaire de Strasbourg, Service d'hématologie pédiatrique, Strasbourg, France
| | - Dalila Adjaoud
- Centre hospitalo-universitaire de Grenoble, Service d'hématologie pédiatrique, Grenoble, France
| | - Cyril Schweitzer
- Centre hospitalo-universitaire de Nancy, Service de Physiologie respiratoire Pédiatrique, Nancy, France
| | - Muriel Le Bourgeois
- AP-HP, Hôpital Necker Enfants Malades, Service de pneumologie pédiatrique, Paris, France
| | - Justine Pages
- AP-HP, Hôpital Robert Debré, Unité d'Epidémiologie Clinique, Inserm, CIC-EC 1426, Paris, France
| | - Adyla Yacoubi
- AP-HP, Hôpital Robert Debré, Unité d'Epidémiologie Clinique, Inserm, CIC-EC 1426, Paris, France
| | - Jean Hugues Dalle
- Université de Paris Cité, AP-HP, Hôpital Robert Debré, Service d'hématologie pédiatrique, Paris, France
| | - Anne Bergeron
- Université de Genève, Hôpitaux Universitaires de Genève, Genève, Suisse
| | - Christophe Delclaux
- Université de Paris Cité, AP-HP, Hôpital Robert Debré, Service de Physiologie Pédiatrique -Centre du Sommeil, INSERM NeuroDiderot, Paris, France
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3
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Xu X, Han W, Han W. Correlation analysis between serum total IgE and FeNO and idiosyncratic reaction in bronchiolitis. Clinics (Sao Paulo) 2024; 79:100384. [PMID: 38754226 PMCID: PMC11126779 DOI: 10.1016/j.clinsp.2024.100384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 04/18/2024] [Indexed: 05/18/2024] Open
Abstract
OBJECTIVE This article focused on the correlation between the changes of serum total Immunoglobulin E (IgE) and Fractional exhaled Nitric Oxide (FeNO) and idiosyncratic reactions in children with bronchiolitis. METHODS One hundred children with bronchiolitis and fifty healthy children were enrolled. Serum total IgE and FeNO were assessed, and the diagnostic value for bronchiolitis and the correlation with the severity of bronchiolitis were analyzed. Bronchiolitis children were divided into idiosyncratic + bronchiolitis and non-idiosyncratic + bronchiolitis groups, the relationship between serum total IgE and FeNO and idiosyncratic reaction was determined, and the diagnostic value of serum total IgE and FeNO for idiosyncratic bronchiolitis was examined. RESULTS FeNO in bronchiolitis children was lower than that in healthy children but there was no significant difference in serum total IgE levels between the two populations. Serum total IgE increased while FeNO decreased with the aggravation of bronchiolitis in bronchiolitis children. The serum total IgE was positively correlated while FeNO was negatively correlated with the severity of bronchiolitis. Serum total IgE was higher in children with idiosyncratic bronchiolitis, but serum total IgE and FeNO were not the risk factors for idiosyncratic bronchiolitis; Area Under the Curve (AUC) of serum total IgE and FeNO for the diagnosis of idiosyncratic bronchiolitis was less than 0.7. CONCLUSION Serum total IgE and FeNO in children with bronchiolitis are related to disease severity and idiosyncratic reaction. FeNO has a diagnostic value for bronchiolitis, but not for idiosyncratic bronchiolitis.
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Affiliation(s)
- XiaoYing Xu
- Department of Pediatrics, Dongying People's Hospital (Dongying Hospital of Shandong Provincial Hospital Group), Dongying City, Shandong Province, China
| | - WeiNing Han
- Department of Pediatrics, Wudi People's Hospital, Binzhou City, Shandong Province, China
| | - WeiPing Han
- Department of Pediatrics, Dongying People's Hospital (Dongying Hospital of Shandong Provincial Hospital Group), Dongying City, Shandong Province, China.
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4
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Bos S, Murray J, Marchetti M, Cheng GS, Bergeron A, Wolff D, Sander C, Sharma A, Badawy SM, Peric Z, Piekarska A, Pidala J, Raj K, Penack O, Kulkarni S, Beestrum M, Linke A, Rutter M, Coleman C, Tonia T, Schoemans H, Stolz D, Vos R. ERS/EBMT clinical practice guidelines on treatment of pulmonary chronic graft- versus-host disease in adults. Eur Respir J 2024; 63:2301727. [PMID: 38485149 DOI: 10.1183/13993003.01727-2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 01/21/2024] [Indexed: 04/02/2024]
Abstract
Chronic graft-versus-host disease (cGvHD) is a common complication after allogeneic haematopoietic stem cell transplantation, characterised by a broad disease spectrum that can affect virtually any organ. Although pulmonary cGvHD is a less common manifestation, it is of great concern due to its severity and poor prognosis. Optimal management of patients with pulmonary cGvHD is complicated and no standardised approach is available. The purpose of this joint European Respiratory Society (ERS) and European Society for Blood and Marrow Transplantation task force was to develop evidence-based recommendations regarding the treatment of pulmonary cGvHD phenotype bronchiolitis obliterans syndrome in adults. A multidisciplinary group representing specialists in haematology, respiratory medicine and methodology, as well as patient advocates, formulated eight PICO (patient, intervention, comparison, outcome) and two narrative questions. Following the ERS standardised methodology, we conducted systematic reviews to address these questions and used the Grading of Recommendations Assessment, Development and Evaluation approach to develop recommendations. The resulting guideline addresses common therapeutic options (inhalation therapy, fluticasone-azithromycin-montelukast, imatinib, ibrutinib, ruxolitinib, belumosudil, extracorporeal photopheresis and lung transplantation), as well as other aspects of general management, such as lung functional and radiological follow-up and pulmonary rehabilitation, for adults with pulmonary cGvHD phenotype bronchiolitis obliterans syndrome. These recommendations include important advancements that could be incorporated in the management of adults with pulmonary cGvHD, primarily aimed at improving and standardising treatment and improving outcomes.
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Affiliation(s)
- Saskia Bos
- Dept of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - John Murray
- Dept of Haematology and Transplant Unit, Christie Hospital NHS Foundation Trust, Manchester, UK
| | - Monia Marchetti
- Dept of Haematology, Azienda Ospedaliera Nazionale SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
| | - Guang-Shing Cheng
- Division of Clinical Research, Fred Hutchinson Cancer Research Center and Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, University of Washington, Seattle, WA, USA
| | - Anne Bergeron
- Dept of Pulmonology, Hôpitaux Universitaires de Genève, Geneva, Switzerland
| | - Daniel Wolff
- Dept of Medicine III, Haematology and Oncology, University Hospital Regensburg, Regensberg, Germany
| | - Clare Sander
- Dept of Respiratory Medicine, Addenbrooke's Hospital, Cambridge, UK
| | - Akshay Sharma
- Dept of Bone Marrow Transplantation and Cellular Therapy, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Sherif M Badawy
- Dept of Pediatrics, Division of Haematology, Oncology and Stem Cell Transplant, Ann and Robert H. Lurie Children's Hospital, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Zinaida Peric
- Dept of Haematology, University Hospital Zagreb, Zagreb, Croatia
- TCWP (Transplant Complications Working Party) of the EBMT
| | - Agnieszka Piekarska
- Dept of Haematology and Transplantology, Medical University of Gdansk, Gdansk, Poland
| | - Joseph Pidala
- Dept of Medical Oncology, Moffitt Cancer Center, Tampa, FL, USA
| | - Kavita Raj
- Dept of Haematology, University College London Hospital NHS Foundation Trust, London, UK
| | - Olaf Penack
- TCWP (Transplant Complications Working Party) of the EBMT
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Dept of Hematology, Oncology and Tumorimmunology, Berlin, Germany
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Samar Kulkarni
- Dept of Haematology and Transplant Unit, Christie Hospital NHS Foundation Trust, Manchester, UK
| | - Molly Beestrum
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | - Matthew Rutter
- ERS Patient Advocacy Committee
- Dept of Respiratory Physiology, Addenbrooke's Hospital, Cambridge, UK
| | | | - Thomy Tonia
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Hélène Schoemans
- Dept of Haematology, University Hospitals Leuven, Leuven, Belgium
- Dept of Public Health and Primary Care, ACCENT VV, KU Leuven - University of Leuven, Leuven, Belgium
| | - Daiana Stolz
- Clinic of Respiratory Medicine, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Contributed equally as senior author
| | - Robin Vos
- Dept of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
- Contributed equally as senior author
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5
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Sonneveld N, Rayment JH, Usemann J, Nielsen KG, Robinson PD. Multiple breath washout and oscillometry after allogenic HSCT: a scoping review. Eur Respir Rev 2023; 32:220251. [PMID: 37495248 PMCID: PMC10369167 DOI: 10.1183/16000617.0251-2022] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 05/04/2023] [Indexed: 07/28/2023] Open
Abstract
Pulmonary chronic graft-versus-host disease (cGVHD) is a substantial cause of pulmonary morbidity and mortality post-haematopoietic stem cell transplantation (HSCT). Current spirometry-based monitoring strategies have significant limitations. Understanding the utility of novel peripheral airway function tests - multiple breath washout (MBW) and oscillometry - is critical in efforts to improve detection, facilitate earlier intervention and improve outcomes. In this scoping review, we identified 17 studies investigating MBW or oscillometry, or both, after allogenic HSCT. Despite small study numbers limiting the ability to draw firm conclusions, several themes were evident. Detectable peripheral airway abnormality in MBW occurred in a substantial proportion prior to HSCT. MBW indices post-HSCT were more frequently abnormal than spirometry when reporting group data and among those with extrapulmonary cGVHD and pulmonary cGVHD. Changes in MBW indices over time may be more indicative of pulmonary complications than absolute values at any given time point. Oscillometry indices were often normal at baseline, but more frequently abnormal in those who developed pulmonary cGVHD. Pooling currently available individual participant data across these studies may improve our ability to formally compare their respective sensitivity and specificity at specific time points and assess the trajectory of MBW and oscillometry indices over time.
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Affiliation(s)
- Nicole Sonneveld
- Department of Respiratory Medicine, Children's Hospital at Westmead, Sydney Children's Hospitals Network, Sydney, Australia
- Discipline of Paediatrics and Child Health, University of Sydney, Sydney, Australia
| | - Jonathan H Rayment
- Division of Respiratory Medicine, Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - Jakob Usemann
- University Children's Hospital Basel (UKBB), Basel, Switzerland
- Division of Respiratory Medicine and Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Kim G Nielsen
- Paediatric Pulmonary Service, Copenhagen University Hospital, Department of Paediatric and Adolescent Medicine, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Paul D Robinson
- Department of Respiratory Medicine, Children's Hospital at Westmead, Sydney Children's Hospitals Network, Sydney, Australia
- Discipline of Paediatrics and Child Health, University of Sydney, Sydney, Australia
- Airway Physiology and Imaging Group, The Woolcock Institute of Medical Research, Sydney, Australia
- Children's Health and Environment Program, Child Health Research Centre, University of Queensland, Brisbane, Australia
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6
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Glanville AR, Benden C, Bergeron A, Cheng GS, Gottlieb J, Lease ED, Perch M, Todd JL, Williams KM, Verleden GM. Bronchiolitis obliterans syndrome after lung or haematopoietic stem cell transplantation: current management and future directions. ERJ Open Res 2022; 8:00185-2022. [PMID: 35898810 PMCID: PMC9309343 DOI: 10.1183/23120541.00185-2022] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 05/18/2022] [Indexed: 11/05/2022] Open
Abstract
Bronchiolitis obliterans syndrome (BOS) may develop after either lung or haematopoietic stem cell transplantation (HSCT), with similarities in histopathological features and clinical manifestations. However, there are differences in the contributory factors and clinical trajectories between the two conditions. BOS after HSCT occurs due to systemic graft-versus-host-disease (GVHD), whereas BOS after lung transplantation is limited to the lung allograft. BOS diagnosis after HSCT is more challenging, as the lung function decline may occur due to extrapulmonary GVHD, causing sclerosis or inflammation in the fascia or muscles of the respiratory girdle. Treatment is generally empirical with no established effective therapies. This review provides rare insights and commonalities of both conditions, that are not well elaborated elsewhere in contemporary literature, and highlights the importance of cross disciplinary learning from experts in other transplant modalities. Treatment algorithms for each condition are presented, based on the published literature and consensus clinical opinion. Immunosuppression should be optimised, and other conditions or contributory factors treated where possible. When initial treatment fails, the ultimate therapeutic option is lung transplantation (or re-transplantation in the case of BOS after lung transplantation) in carefully selected candidates. Novel therapies under investigation include aerosolised liposomal cyclosporine, Janus kinase inhibitors, antifibrotic therapies, and (in patients with BOS after lung transplantation) B-cell–directed therapies. Effective novel treatments that have a tangible impact on survival and thereby avoid the need for lung transplantation or re-transplantation are urgently required.
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7
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Artificial Intelligence Algorithm-Based High-Resolution Computed Tomography Image in the Treatment of Children with Bronchiolitis Obliterans by Traditional Chinese Medicine Method of Resolving Phlegm and Removing Blood Stasis. CONTRAST MEDIA & MOLECULAR IMAGING 2022; 2022:8952791. [PMID: 35685664 PMCID: PMC9166993 DOI: 10.1155/2022/8952791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/13/2022] [Accepted: 04/18/2022] [Indexed: 12/31/2022]
Abstract
This research was aimed to explore the application of high-resolution computed tomography (HRCT) based on intelligent iterative reconstruction technique in the early diagnosis and treatment of bronchiolitis obliterans (BO) in children and to explore the efficacy of traditional Chinese medicine (TCM) in resolving phlegm and removing blood stasis. Sixty pediatric patients with BO were selected as the study subjects and diagnosed by HRCT scanning, and the scanned images were processed by iterative reconstruction technique. The patients were treated with TCM therapy of resolving phlegm and removing blood stasis alone (group A), HRCT-guided TCM therapy of resolving phlegm and removing blood stasis (group B), and iterative reconstruction HRCT-guided TCM therapy of resolving phlegm and removing blood stasis (group C). The results showed that the lung HRCT image after iterative reconstruction was closer to the original image than that after filtered back projection reconstruction, and the edge of the image after filtered back projection reconstruction was more blurred and the noise was higher. The image obtained by iterative reconstruction technique was smoother and clearer, and the image stability after iterative reconstruction was higher. The treatment results showed that the proportion of moderate and severe obstruction in group C was 5.18%, which was significantly lower than that in group A (18.75%) and group B (11.29%), and group B was significantly lower than that in group A (18.75%) (P < 0.05). The proportion of clinical effect in group C after treatment was 70.18%, significantly higher than that in group A (55.5%) and group B (63.34%), and that in group B was significantly higher than that in group A (55.5%) (P < 0.05). In summary, the lung HRCT after iterative reconstruction can more clearly and intuitively show the lesion site, which has a key role in guiding the early diagnosis and treatment planning of BO; the HRCT image based on iterative reconstruction technique combined with TCM treatment of removing blood stasis and resolving phlegm has a better therapeutic effect on children, with a high application value.
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8
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Long-Term Health Effects of Curative Therapies on Heart, Lungs, and Kidneys for Individuals with Sickle Cell Disease Compared to Those with Hematologic Malignancies. J Clin Med 2022; 11:jcm11113118. [PMID: 35683502 PMCID: PMC9181610 DOI: 10.3390/jcm11113118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/16/2022] [Accepted: 05/20/2022] [Indexed: 12/30/2022] Open
Abstract
The goal of curing children and adults with sickle cell disease (SCD) is to maximize benefits and minimize intermediate and long-term adverse outcomes so that individuals can live an average life span with a high quality of life. While greater than 2000 individuals with SCD have been treated with curative therapy, systematic studies have not been performed to evaluate the long-term health effects of hematopoietic stem cell transplant (HSCT) in this population. Individuals with SCD suffer progressive heart, lung, and kidney disease prior to curative therapy. In adults, these sequalae are associated with earlier death. In comparison, individuals who undergo HSCT for cancer are heavily pretreated with chemotherapy, resulting in potential acute and chronic heart, lung, and kidney disease. The long-term health effects on the heart, lung, and kidney for children and adults undergoing HSCT for cancer have been extensively investigated. These studies provide the best available data to extrapolate the possible late health effects after curative therapy for SCD. Future research is needed to evaluate whether HSCT abates, stabilizes, or exacerbates heart, lung, kidney, and other diseases in children and adults with SCD receiving myeloablative and non-myeloablative conditioning regimens for curative therapy.
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9
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Vece TJ, Popler J, Gower WA. Pediatric pulmonology 2020 year in review: Rare and diffuse lung disease. Pediatr Pulmonol 2022; 57:807-813. [PMID: 34964566 DOI: 10.1002/ppul.25807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/24/2021] [Accepted: 12/27/2021] [Indexed: 11/08/2022]
Abstract
Pediatric Pulmonology publishes original research, review articles, and case reports on topics related to a wide range of children's respiratory disorders. Here we review some of the most notable manuscripts published in 2020 in this journal on (1) children's interstitial lung disease (chILD), (2) congenital airway and lung anomalies, and (3) primary ciliary dyskinesia and other non-cystic fibrosis bronchiectasis. The articles reviewed are discussed in context with published works from other journals.
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Affiliation(s)
- Timothy J Vece
- Division of Pediatric Pulmonology and Program for Rare and Interstitial Lung Disease, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Jonathan Popler
- Children's Physician Group - Pulmonology, Children's Healthcare of Atlanta, Atlanta, Georgia, USA
| | - William A Gower
- Division of Pediatric Pulmonology and Program for Rare and Interstitial Lung Disease, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
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10
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Duecker RP, De Mir Messa I, Jerkic S, Kochems A, Gottwald G, Moreno‐Galdó A, Rosewich M, Gronau L, Zielen S, Geburtig‐Chiocchetti A, Kreyenberg H, Schubert R. Epigenetic regulation of inflammation by microRNAs in post‐infectious bronchiolitis obliterans. Clin Transl Immunology 2022; 11:e1376. [PMID: 35228871 PMCID: PMC8859819 DOI: 10.1002/cti2.1376] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 11/14/2021] [Accepted: 02/04/2022] [Indexed: 12/13/2022] Open
Affiliation(s)
- Ruth P Duecker
- Division for Allergy, Pneumology and Cystic Fibrosis Department for Children and Adolescence Goethe University Frankfurt Germany
| | - Ines De Mir Messa
- Allergy, Pulmonology and Cystic Fibrosis Section Department of Pediatrics Vall d’Hebron Hospital Universitari Universitat Autònoma de Barcelona Barcelona Spain
| | - Silvija‐Pera Jerkic
- Division for Allergy, Pneumology and Cystic Fibrosis Department for Children and Adolescence Goethe University Frankfurt Germany
| | - Annalena Kochems
- Division for Allergy, Pneumology and Cystic Fibrosis Department for Children and Adolescence Goethe University Frankfurt Germany
| | - Gabriele Gottwald
- Division for Allergy, Pneumology and Cystic Fibrosis Department for Children and Adolescence Goethe University Frankfurt Germany
| | - Antonio Moreno‐Galdó
- Allergy, Pulmonology and Cystic Fibrosis Section Department of Pediatrics Vall d’Hebron Hospital Universitari Universitat Autònoma de Barcelona Barcelona Spain
- CIBER of Rare Diseases (CIBERER) Instituto de Salud Carlos III (ISCIII) Madrid Spain
| | - Martin Rosewich
- Division for Allergy, Pneumology and Cystic Fibrosis Department for Children and Adolescence Goethe University Frankfurt Germany
| | - Lucia Gronau
- Division for Allergy, Pneumology and Cystic Fibrosis Department for Children and Adolescence Goethe University Frankfurt Germany
| | - Stefan Zielen
- Division for Allergy, Pneumology and Cystic Fibrosis Department for Children and Adolescence Goethe University Frankfurt Germany
| | - Andreas Geburtig‐Chiocchetti
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy Goethe University Frankfurt Germany
| | - Hermann Kreyenberg
- Division for Stem Cell Transplantation and Immunology Department for Children and Adolescence Goethe University Frankfurt Germany
| | - Ralf Schubert
- Division for Allergy, Pneumology and Cystic Fibrosis Department for Children and Adolescence Goethe University Frankfurt Germany
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11
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Williams KM, Pavletic SZ, Lee SJ, Martin PJ, Farthing DE, Hakim FT, Rose J, Manning-Geist BL, Gea-Banacloche JC, Comis LE, Cowen EW, Justus DG, Baird K, Cheng GS, Avila D, Steinberg SM, Mitchell SA, Gress RE. Prospective phase II trial of montelukast to treat bronchiolitis obliterans syndrome after hematopoietic cell transplant and investigation into BOS pathogenesis. Transplant Cell Ther 2022; 28:264.e1-264.e9. [PMID: 35114411 PMCID: PMC9081205 DOI: 10.1016/j.jtct.2022.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/16/2022] [Accepted: 01/24/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Bronchiolitis obliterans syndrome (BOS) is a severe manifestation of chronic graft-versus-host disease (cGVHD) following hematopoietic cell transplantation (HCT). Montelukast interrupts cysteinyl leukotriene activity and may diminish the activation and homing of cells to bronchioles and subsequent fibrosis. OBJECTIVE We performed a prospective phase II trial to test whether montelukast altered lung decline for patients with BOS after HCT. STUDY DESIGN We performed a single arm, open-label, multi-institutional study with primary endpoints of: i) FEV1 stability or improvement (<15% decline) and ii) slope of FEV1<1 point decline after six months treatment. Secondary endpoints included symptom and functional response, and immune correlates investigating the role of leukotrienes in BOS progression. RESULTS 25 patients enrolled with moderate to severe lung disease after three months of stable cGVHD therapy. Montelukast was well-tolerated and no patient required escalation of BOS-directed therapy. At the primary endpoint, all evaluable patients (n=23) met criteria for treatment success using FEV1% predicted, and all but one had stable or improved FEV1 slope. In those with >5% FEV1 improvement, clinically meaningful improvements were seen in the Lee scores of breathing, energy, and mood. Improvements in the Human Activity Profile and 6-minute-walk test were observed in those with <5% FEV1 decline. Overall survival was 87% at two-years. Immune correlates showed elevated leukotriene receptor levels on blood eosinophils and monocytes vs. healthy controls, elevated urine leukotrienes in 45% of cohort, and cysteinyl leukotriene receptors on bronchoalveolar lavage subsets and a predominance of Th2 T cells, all pre-treatment. CONCLUSIONS These data suggest that montelukast may safely halt progression of BOS after HCT and that leukotrienes may play a role in the biology of BOS.
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Affiliation(s)
- Kirsten M Williams
- Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Emory University, 1760 Haygood Drive, 3rd floor W362, Atlanta GA, US, 30322.
| | - Steven Z Pavletic
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Bethesda MD, US, 20892
| | - Stephanie J Lee
- Fred Hutchinson Cancer Research Center, 1100 Fairview Ave, Seattle, WA, US 98109
| | - Paul J Martin
- Fred Hutchinson Cancer Research Center, 1100 Fairview Ave, Seattle, WA, US 98109
| | - Don E Farthing
- Experimental Transplantation and Immunotherapy Branch, National Cancer Institute, National Institutes of Health, 10 Center Drive, Bethesda, MD, US, 20892
| | - Frances T Hakim
- Experimental Transplantation and Immunotherapy Branch, National Cancer Institute, National Institutes of Health, 10 Center Drive, Bethesda, MD, US, 20892
| | - Jeremy Rose
- Experimental Transplantation and Immunotherapy Branch, National Cancer Institute, National Institutes of Health, 10 Center Drive, Bethesda, MD, US, 20892
| | - Beryl L Manning-Geist
- Gynecology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, US, 10065
| | - Juan C Gea-Banacloche
- Division of Clinical Research, National Institute of Allergy and Immunology, National Institutes of Health, 10 Center Drive, Bethesda, MD, US, 20892
| | - Leora E Comis
- Rehabilitation Medicine Department, Clinical Center, NIH, Bethesda, MD
| | - Edward W Cowen
- Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, 10 Center Dr, Room 12N240A, Bethesda, MD, US, 20892
| | - David G Justus
- Department of Laboratory Medicine, Boston Children's Hospital, 300 Longwood Avenue, Boston, MA 02115, US
| | - Kristin Baird
- Pediatric Oncology Branch, National Cancer Institute, NIH, Bethesda, MD
| | - Guang-Shing Cheng
- Department of Medicine, University of Washington, Seattle, WA, US, 98109; Fred Hutchinson Cancer Research Center, 1100 Fairview Ave, Seattle, WA, US 98109
| | - Daniele Avila
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Center Drive, Bethesda MD, US, 20892
| | - Seth M Steinberg
- Biostatistics and Data Management Section, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, US, 20892
| | - Sandra A Mitchell
- Outcomes Research Branch, Division of Cancer Control and Population Sciences, National Cancer Institute, NIH, 9609 Medical Center Drive, Bethesda MD, US, 20892
| | - Ronald E Gress
- Experimental Transplantation and Immunotherapy Branch, National Cancer Institute, National Institutes of Health, 10 Center Drive, Bethesda, MD, US, 20892
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12
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Williams KM. Noninfectious complications of hematopoietic cell transplantation. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2021; 2021:578-586. [PMID: 34889438 PMCID: PMC8791176 DOI: 10.1182/hematology.2021000293] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Noninfectious lung diseases contribute to nonrelapse mortality. They constitute a spectrum of diseases that can affect the parenchyma, airways, or vascular pulmonary components and specifically exclude cardiac and renal causes. The differential diagnoses of these entities differ as a function of time after hematopoietic cell transplantation. Specific diagnosis, prognosis, and optimal treatment remain challenging, although progress has been made in recent decades.
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Affiliation(s)
- Kirsten M. Williams
- Correspondence Kirsten M. Williams, Blood and Marrow
Transplant Program, Aflac Cancer and Blood Disorders Center, Emory University
School of Medicine, Children's Healthcare of Atlanta, 1760 Haygood Dr,
3rd floor W362, Atlanta, GA 30322; e-mail:
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13
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Jung S, Yoon HM, Yoon J, Park M, Rhee ES, Kim H, Koh KN, Lee JS, Im HJ, Yu J. The association of lung function changes with outcomes in children with bronchiolitis obliterans syndrome after hematopoietic stem cell transplantation. Pediatr Pulmonol 2021; 56:3332-3341. [PMID: 34357700 DOI: 10.1002/ppul.25617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 06/17/2021] [Accepted: 07/15/2021] [Indexed: 01/17/2023]
Abstract
BACKGROUND Bronchiolitis obliterans syndrome (BOS) is a life-threatening respiratory complication of allogeneic hematopoietic stem cell transplantation (HSCT). Although pulmonary function testing is crucial for monitoring BOS, little information exists on the association of these test results with outcomes in children with BOS. OBJECTIVES The purpose of this study was to determine the correlation between changes in lung function after BOS diagnosis and long-term outcomes. METHODS A total of 428 children underwent allogeneic HSCT from January 2006 to December 2017 at Asan Medical Center. Twenty-three (5.4%) were diagnosed with BOS after allogeneic HSCT, and their clinical data were reviewed. Twenty-one subjects underwent regular pulmonary function testing for 24 months after BOS diagnosis. RESULTS Among the 21 children with BOS, 8 died, 5 underwent lung transplantation (TPL), and 15 required oxygen (O2 ) therapy. The FEV1 % predicted (pred), FVC% pred, and FEF25%-75% pred were 37.8 ± 12.7% (mean ± SD), 62.2 ± 16.2%, and 16.4 ± 9.6%, respectively, at the time of BOS diagnosis. Changes in the FEV1 % pred were greater in the death and lung TPL groups (-24.8 ± 22.3%) than in the survival without lung TPL group (5.7 ± 21.8%) and greater in the O2 therapy (-19.4 ± 23.4%) group than in the group without O2 therapy (14.2 ± 20.0%) during the first 3 months after BOS diagnosis. CONCLUSION The change in FEV1 during the first 3 months after BOS diagnosis correlated with outcomes including survival, lung TPL, and O2 therapy. These results suggest that more active intervention in the first 3 months after BOS diagnosis may be needed to improve prognosis.
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Affiliation(s)
- Sungsu Jung
- Department of Pediatrics, Pusan National University Children's Hospital, Pusan National University School of Medicine, Yangsan, Korea
| | - Hee Mang Yoon
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jisun Yoon
- Department of Pediatrics, Mediplex Sejong Hospital, Incheon, Korea
| | - Minjee Park
- Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Eun Sang Rhee
- Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Hyery Kim
- Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Kyung Nam Koh
- Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jin Seong Lee
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Ho Joon Im
- Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jinho Yu
- Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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14
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Weng T, Lin X, Wang L, Lv J, Dong L. Follow-up on the therapeutic effects of a budesonide, azithromycin, montelukast, and acetylcysteine (BAMA) regimen in children with post-infectious bronchiolitis obliterans. J Thorac Dis 2021; 13:4775-4784. [PMID: 34527318 PMCID: PMC8411176 DOI: 10.21037/jtd-20-3195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 07/14/2021] [Indexed: 01/16/2023]
Abstract
Background Post-infectious bronchiolitis obliterans (PIBO) is a rare, severe chronic lung disease without optimal treatment. Currently, treatment in children mainly relies on systemic corticosteroids, but long-term use of these drugs may lead to adverse reactions. This study aimed to evaluate the short-term efficacy of the budesonide, azithromycin, montelukast, and acetylcysteine (BAMA) regimen in paediatric PIBO patients and whether it can reduce systemic corticosteroid use. Methods This was a prospective study. From June 2017 to July 2020, patients diagnosed with PIBO at Yuying Children’s Hospital of Wenzhou Medical University were treated with the BAMA regimen for 3 months. Methylprednisolone was added only when the clinical manifestations did not improve or deteriorated. All patients were followed up every 2 to 4 weeks, and changes in clinical symptoms were recorded. Pulmonary function tests and high-resolution computed tomography (HRCT) were performed, and systemic corticosteroid use was recorded after the 3-month follow-up. Results A total of 75 patients with PIBO were included; overall, 54 patients completed the course of treatment. After treatment, the respiratory manifestations were improved in 37 patients (68.5%), but 4 patients (7.4%) showed decreased exercise tolerance, and 2 patients (3.7%) were readmitted to the hospital. Additionally, 17 (56.7%) of the 30 patients whose pulmonary function was re-examined showed improvement, and 28 (77.8%) of the 36 patients who underwent HRCT showed marked improvement. Importantly, 20 patients (54.1%) received systemic corticosteroids for 2 weeks or less, while 31.5% of patients used no corticosteroids. Conclusions The BAMA regimen effectively relieved clinical symptoms and signs of PIBO in children, improved pulmonary function and HRCT manifestations, and reduced the use of systemic corticosteroids.
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Affiliation(s)
- Tingting Weng
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xixi Lin
- Department of Pharmacy, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Leying Wang
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jiamei Lv
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Lin Dong
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
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15
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Jerkic SP, Koc-Günel S, Herrmann E, Kriszeleit L, Eckrich J, Schubert R, Zielen S. Long-term course of bronchial inflammation and pulmonary function testing in children with postinfectious bronchiolitis obliterans. Pediatr Pulmonol 2021; 56:2966-2972. [PMID: 34156164 DOI: 10.1002/ppul.25547] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 05/30/2021] [Accepted: 06/06/2021] [Indexed: 01/06/2023]
Abstract
RATIONALE Postinfectious bronchiolitis obliterans (PIBO) is a rare, chronic respiratory condition, which follows an acute insult due to a severe infection of the lower airways. OBJECTIVES The objective of this study was to investigate the long-term course of bronchial inflammation and pulmonary function testing in children with PIBO. METHODS Medical charts of 21 children with PIBO were analyzed retrospectively at the Children's University Hospital Frankfurt/Main Germany. Pulmonary function tests (PFTs) with an interval of at least 1 month were studied between 2002 and 2019. A total of 382 PFTs were analyzed retrospectively and per year, the two best PFTs, in total 217, were evaluated. Additionally, 56 sputum analysis were assessed and the sputum neutrophils were evaluated. RESULTS The evaluation of the 217 PFTs showed a decrease in FEV1 with a loss of 1.07% and a loss in z score of -0.075 per year. FEV1/FVC decreased by 1.44 per year. FVC remained stable, showing a nonsignificant increase by 0.006 in z score per year. However, FEV1 and FVC in L increased significantly with FEV1 0.032 L per cm and FVC 0.048 L/cm in height. Sputum neutrophils showed a significant increase of 2.12% per year. CONCLUSION Our results demonstrated that in patients with PIBO pulmonary function decreased significantly showing persistent obstruction over an average follow-up period of 8 years. However, persistent lung growth was revealed. In addition, pulmonary inflammation persisted clearly showing an increasing amount of neutrophils in induced sputum. Patients did not present with a general susceptibility to respiratory infections.
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Affiliation(s)
- Silvija P Jerkic
- Department for Children and Adolescents, Division of Allergy, Pulmonology and Cystic fibrosis, University Hospital, Frankfurt, Germany
| | - Sinem Koc-Günel
- Department for Internal Medicine, Division of Allergy, Pulmonology and Cystic Fibrosis, University Hospital, Frankfurt, Germany
| | - Eva Herrmann
- Division of Biostatistics and Mathematical Modelling, Goethe University, Frankfurt, Germany
| | - Lia Kriszeleit
- Department for Children and Adolescents, Division of Allergy, Pulmonology and Cystic fibrosis, University Hospital, Frankfurt, Germany
| | - Jonas Eckrich
- Department of Otorhinolaryngology Head- and Neck-Surgery, University Medical Center Mainz, Mainz, Germany
| | - Ralf Schubert
- Department for Children and Adolescents, Division of Allergy, Pulmonology and Cystic fibrosis, University Hospital, Frankfurt, Germany
| | - Stefan Zielen
- Department for Children and Adolescents, Division of Allergy, Pulmonology and Cystic fibrosis, University Hospital, Frankfurt, Germany
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16
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Shanthikumar S, Welsh L, Westrupp N, Cole T, Frayman KB, Robertson CF, Ranganathan SC. Identification of pediatric bronchiolitis obliterans syndrome posthematopoietic stem cell transplantation; surveillance is the key. Pediatr Pulmonol 2020; 55:2840-2841. [PMID: 32816385 DOI: 10.1002/ppul.25023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 08/06/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Shivanthan Shanthikumar
- Respiratory and Sleep Medicine, Royal Children's Hospital, Melbourne, Australia.,Respiratory Diseases, Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Liam Welsh
- Respiratory and Sleep Medicine, Royal Children's Hospital, Melbourne, Australia.,Respiratory Diseases, Murdoch Children's Research Institute, Melbourne, Australia
| | - Nicole Westrupp
- Respiratory and Sleep Medicine, Royal Children's Hospital, Melbourne, Australia.,Respiratory Diseases, Murdoch Children's Research Institute, Melbourne, Australia
| | - Theresa Cole
- Department of Paediatrics, University of Melbourne, Melbourne, Australia.,Allergy and Immunology, Royal Children's Hospital, Melbourne, Australia
| | - Katherine B Frayman
- Respiratory and Sleep Medicine, Royal Children's Hospital, Melbourne, Australia.,Respiratory Diseases, Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Colin F Robertson
- Respiratory and Sleep Medicine, Royal Children's Hospital, Melbourne, Australia.,Respiratory Diseases, Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Sarath C Ranganathan
- Respiratory and Sleep Medicine, Royal Children's Hospital, Melbourne, Australia.,Respiratory Diseases, Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia
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