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Casitas R, Galera R, Torres-Vargas M, Garcia-Tovar S, Alfaro E, Díaz-Garcia E, Martinez-Cerón E, Garcia-Garcia M, Torres I, Núñez-Fernández M, Fernández-Villar A, Fernández-Velilla M, Añón JM, Cubillos-Zapata C, García-Río F. Medium-Term Disability and Long-Term Functional Impairment Persistence in Survivors of Severe COVID-19 ARDS: Clinical and Physiological Insights. Arch Bronconeumol 2024:S0300-2896(24)00185-6. [PMID: 38853119 DOI: 10.1016/j.arbres.2024.05.021] [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: 03/11/2024] [Revised: 05/09/2024] [Accepted: 05/14/2024] [Indexed: 06/11/2024]
Abstract
BACKGROUND Although the medium- and long-term sequelae of survivor of acute respiratory distress syndrome (ARDS) of any cause have been documented, little is known about the way in which COVID-19-induced ARDS affects functional disability and exercise components. Our aims were to examine the medium-term disability in severe COVID-19-associated ARDS survivors, delineate pathophysiological changes contributing to their exercise intolerance, and explore its utility in predicting long-term functional impairment persistence. METHODS We studied 108 consecutive subjects with severe COVID-19 ARDS who remained alive 6 months after intensive care unit (ICU) discharge. Lung morphology was assessed with chest non-contrast CT scans and CT angiography. Functional evaluation included spirometry, plethysmography, muscle strength, and diffusion capacity, with assessment of gas exchange components through diffusing capacity of nitric oxide. Disability was assessed through an incremental exercise test, and measurements were repeated 12 and 24 months later in patients with functional impairments. RESULTS At 6 months after ICU discharge, a notable dissociation between morphological and clinical-functional sequelae was identified. Moderate-severe disability was present in 47% of patients and these subjects had greater limitation of ventilatory mechanics and gas exchange, as well as greater symptomatic perception during exercise and a probable associated cardiac limitation. Female sex, hypothyroidism, reduced membrane diffusion component, lower functional residual capacity, and high-attenuation lung volume were independently associated with the presence of moderate-severe functional disability, which in turn was related to higher frequency and greater intensity of dyspnea and worse quality of life. Out of the 71 patients with reduced lung volumes or diffusion capacity at 6 months post-ICU discharge, only 19 maintained a restrictive disorder associated with gas exchange impairment at 24 months post-discharge. In these patients, 6-month values for diffusion membrane component, maximal oxygen uptake, ventilatory equivalent for CO2, and dead space to tidal volume ratio were identified as independent risk factors for persistence of long-term functional sequelae. CONCLUSIONS Less than half of survivors of COVID-19 ARDS have moderate-severe disability in the medium term, identifying several risk factors. In turn, diffusion membrane component and exercise tolerance at 6-month ICU discharge are independently associated with the persistence of long-term functional sequelae.
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Affiliation(s)
- Raquel Casitas
- Servicio de Neumología, Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, Spain; Departamento de Medicina, Universidad Autónoma de Madrid, Spain
| | - Raúl Galera
- Servicio de Neumología, Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, Spain; Grupo de Enfermedades Respiratorias, IdiPAZ, Madrid, Spain
| | - María Torres-Vargas
- Servicio de Neumología, Hospital Universitario La Paz, IdiPAZ, Madrid, Spain
| | - Sara Garcia-Tovar
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, Spain; Grupo de Enfermedades Respiratorias, IdiPAZ, Madrid, Spain
| | - Enrique Alfaro
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, Spain; Grupo de Enfermedades Respiratorias, IdiPAZ, Madrid, Spain
| | - Elena Díaz-Garcia
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, Spain; Grupo de Enfermedades Respiratorias, IdiPAZ, Madrid, Spain
| | - Elisabet Martinez-Cerón
- Servicio de Neumología, Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, Spain; Grupo de Enfermedades Respiratorias, IdiPAZ, Madrid, Spain
| | - Miguel Garcia-Garcia
- Departamento de Análisis Económico y Economía Cuantitativa, Universidad Complutense de Madrid, Spain
| | - Isabel Torres
- Servicio de Radiodiagnóstico, Hospital Universitario La Paz, IdiPAZ, Madrid, Spain
| | - Marta Núñez-Fernández
- Servicio de Neumología, Complejo Hospitalario Universitario de Vigo, Spain; NeumoVigo I+i, Galicia Sur Health Research Institute (IIGS), Vigo, Spain
| | - Alberto Fernández-Villar
- Servicio de Neumología, Complejo Hospitalario Universitario de Vigo, Spain; NeumoVigo I+i, Galicia Sur Health Research Institute (IIGS), Vigo, Spain
| | | | - José Manuel Añón
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, Spain; Servicio de Medicina Intensiva, Hospital Universitario La Paz, IdiPAZ, Madrid, Spain
| | - Carolina Cubillos-Zapata
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, Spain; Grupo de Enfermedades Respiratorias, IdiPAZ, Madrid, Spain
| | - Francisco García-Río
- Servicio de Neumología, Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Madrid, Spain; Departamento de Medicina, Universidad Autónoma de Madrid, Spain; Grupo de Enfermedades Respiratorias, IdiPAZ, Madrid, Spain.
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Dorelli G, Sartori G, Fasoli G, Ridella N, Bianchini N, Braggio M, Ferrari M, Venturelli M, Carbonare LD, Capelli C, Grassi B, Crisafulli E. Persisting exercise ventilatory inefficiency in subjects recovering from COVID-19. Longitudinal data analysis 34 months post-discharge. BMC Pulm Med 2024; 24:258. [PMID: 38796432 PMCID: PMC11128102 DOI: 10.1186/s12890-024-03070-1] [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: 02/04/2024] [Accepted: 05/21/2024] [Indexed: 05/28/2024] Open
Abstract
BACKGROUND SARS-CoV-2 infection has raised concerns about long-term health repercussions. Exercise ventilatory inefficiency (EVin) has emerged as a notable long-term sequela, potentially impacting respiratory and cardiovascular health. This study aims to assess the long-term presence of EVin after 34 months and its association with cardiorespiratory health in post-COVID patients. METHODS In a longitudinal study on 32 selected post-COVID subjects, we performed two cardiopulmonary exercise tests (CPETs) at 6 months (T0) and 34 months (T1) after hospital discharge. The study sought to explore the long-term persistence of EVin and its correlation with respiratory and cardiovascular responses during exercise. Measurements included also V̇O2peak, end-tidal pressure of CO2 (PETCO2) levels, oxygen uptake efficiency slope (OUES) and other cardiorespiratory parameters, with statistical significance set at p < 0.05. The presence of EVin at both T0 and T1 defines a persisting EVin (pEVin). RESULTS Out of the cohort, five subjects (16%) have pEVin at 34 months. Subjects with pEVin, compared to those with ventilatory efficiency (Evef) have lower values of PETCO2 throughout exercise, showing hyperventilation. Evef subjects demonstrated selective improvements in DLCO and oxygen pulse, suggesting a recovery in cardiorespiratory function over time. In contrast, those with pEvin did not exhibit these improvements. Notably, significant correlations were found between hyperventilation (measured by PETCO2), oxygen pulse and OUES, indicating the potential prognostic value of OUES and Evin in post-COVID follow-ups. CONCLUSIONS The study highlights the clinical importance of long-term follow-up for post-COVID patients, as a significant group exhibit persistent EVin, which correlates with altered and potentially unfavorable cardiovascular responses to exercise. These findings advocate for the continued investigation into the long-term health impacts of COVID-19, especially regarding persistent ventilatory inefficiencies and their implications on patient health outcomes.
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Affiliation(s)
- Gianluigi Dorelli
- School of Medicine in Sports and Exercise, University of Verona, Verona, Italy
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Giulia Sartori
- Department of Medicine, Respiratory Medicine Unit, University of Verona and Azienda Ospedaliera Universitaria Integrata of Verona, Largo L. A. Scuro, 10, Verona, 37124, Italy
| | - Giulia Fasoli
- School of Medicine in Sports and Exercise, University of Verona, Verona, Italy
| | - Nicolò Ridella
- Department of Medicine, Respiratory Medicine Unit, University of Verona and Azienda Ospedaliera Universitaria Integrata of Verona, Largo L. A. Scuro, 10, Verona, 37124, Italy
| | - Nicola Bianchini
- Department of Medicine, Respiratory Medicine Unit, University of Verona and Azienda Ospedaliera Universitaria Integrata of Verona, Largo L. A. Scuro, 10, Verona, 37124, Italy
| | - Michele Braggio
- School of Medicine in Sports and Exercise, University of Verona, Verona, Italy
| | - Marcello Ferrari
- School of Medicine in Sports and Exercise, University of Verona, Verona, Italy
- Department of Medicine, Respiratory Medicine Unit, University of Verona and Azienda Ospedaliera Universitaria Integrata of Verona, Largo L. A. Scuro, 10, Verona, 37124, Italy
| | - Massimo Venturelli
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | | | - Carlo Capelli
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Bruno Grassi
- Department of Medicine, University of Udine, Udine, Italy
| | - Ernesto Crisafulli
- Department of Medicine, Respiratory Medicine Unit, University of Verona and Azienda Ospedaliera Universitaria Integrata of Verona, Largo L. A. Scuro, 10, Verona, 37124, Italy.
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Longobardi I, Prado DMLD, de Andrade DCO, Goessler KF, de Oliveira Júnior GN, de Almeida Azevedo R, Leitão AE, Santos JVP, Pinto ALDS, Gualano B, Roschel H. Cardiorespiratory abnormalities in ICU survivors of COVID-19 with postacute sequelae of SARS-CoV-2 infection are unrelated to invasive mechanical ventilation. Am J Physiol Heart Circ Physiol 2024; 326:H907-H915. [PMID: 38334972 DOI: 10.1152/ajpheart.00073.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 02/10/2024]
Abstract
Postacute sequelae of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection (PASC) often leads to exertional intolerance and reduced exercise capacity, particularly in individuals previously admitted to an intensive care unit (ICU). However, the impact of invasive mechanical ventilation (IMV) on PASC-associated cardiorespiratory abnormalities during exercise remains poorly understood. This single-center, cross-sectional study aimed to gather knowledge on this topic. Fifty-two patients with PASC recruited ∼6 mo after ICU discharge were clustered based on their need for IMV (PASC + IMV, n = 27) or noninvasive support therapy (PASC + NIS, n = 25). Patients underwent pulmonary function and cardiopulmonary exercise testing (CPX) and were compared with a reference group (CONTROL, n = 19) comprising individuals of both sexes with similar age, comorbidities, and physical activity levels but without a history of COVID-19 illness. Individuals with PASC, irrespective of support therapy, presented with higher rates of cardiorespiratory abnormalities than CONTROL, especially dysfunctional breathing patterns, dynamic hyperinflation, reduced oxygen uptake and oxygen pulse, and blunted heart rate recovery (all P < 0.05). Only the rate of abnormal oxygen pulse was greater among PASC + IMV group than PASC + NIS group (P = 0.05). Mean estimates for all CPX variables were comparable between PASC + IMV and PASC + NIS groups (all P > 0.05). These findings indicate significant involvement of both central and peripheral factors, leading to exertional intolerance in individuals with PASC previously admitted to the ICU, regardless of their need for IMV.NEW & NOTEWORTHY We found cardiorespiratory abnormalities in ICU survivors of severe-to-critical COVID-19 with PASC to be independent of IMV need. Overall, both group of patients experienced dysfunctional breathing patterns, dynamic hyperinflation, lower oxygen uptake and oxygen pulse, and blunted heart rate responses to CPX. PASC seems to impact exertional tolerance and exercise capacity due to ventilatory inefficiency, impaired aerobic metabolism, and potential systolic and autonomic dysfunction, all of these irrespective of support therapy during ICU stay.
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Affiliation(s)
- Igor Longobardi
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Center of Lifestyle Medicine, Laboratory of Assessment and Conditioning in Rheumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, São Paulo, Brazil
| | - Danilo Marcelo Leite do Prado
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Center of Lifestyle Medicine, Laboratory of Assessment and Conditioning in Rheumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, São Paulo, Brazil
| | | | - Karla Fabiana Goessler
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Center of Lifestyle Medicine, Laboratory of Assessment and Conditioning in Rheumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, São Paulo, Brazil
| | - Gersiel Nascimento de Oliveira Júnior
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Center of Lifestyle Medicine, Laboratory of Assessment and Conditioning in Rheumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, São Paulo, Brazil
| | - Rafael de Almeida Azevedo
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Center of Lifestyle Medicine, Laboratory of Assessment and Conditioning in Rheumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, São Paulo, Brazil
| | - Alice Erwig Leitão
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Center of Lifestyle Medicine, Laboratory of Assessment and Conditioning in Rheumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, São Paulo, Brazil
| | - Jhonnatan Vasconcelos Pereira Santos
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Center of Lifestyle Medicine, Laboratory of Assessment and Conditioning in Rheumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, São Paulo, Brazil
| | - Ana Lucia de Sá Pinto
- Rheumatology Division, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, Brazil
| | - Bruno Gualano
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Center of Lifestyle Medicine, Laboratory of Assessment and Conditioning in Rheumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, São Paulo, Brazil
- Rheumatology Division, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, Brazil
| | - Hamilton Roschel
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Center of Lifestyle Medicine, Laboratory of Assessment and Conditioning in Rheumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, São Paulo, Brazil
- Rheumatology Division, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, Brazil
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Campos RP, Messias Oliveira JG, de Oliveira Farias I, de Souza VCV, de Alegria SG, Xavier RS, Lopes AJ. Effects of pulmonary rehabilitation on ventilation dynamics measured during exertion in patients with post-acute COVID-19 syndrome: A cross-sectional observational study. PLoS One 2024; 19:e0296707. [PMID: 38306350 PMCID: PMC10836674 DOI: 10.1371/journal.pone.0296707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/15/2023] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND Pulmonary rehabilitation (PR) is recommended in people with post-acute COVID-19 syndrome (PACS), although there is a lack of studies evaluating its benefits via the most commonly used primary endpoint: the six-minute walk test (6MWT). This study evaluated the effects of PR on the dynamics of ventilation measured during the 6MWT in patients with PACS and, secondarily, evaluated the association of these findings with measures of lung function and structure. METHODS This was an observational cross-sectional study of patients with PACS, in which 33 had undergone PR (PR-PACS group) and 32 had not undergone PR (NPR-PACS group). These patients underwent Spiropalm®-equipped 6MWT with measurement of inspiratory capacity (IC) to evaluate dynamic hyperinflation (DH). In addition, they performed spirometry, impulse oscillometry (IOS) and lung ultrasound (LUS). RESULTS Spirometry was abnormal in 21.2% and 31.3% of participants in the PR-PACS and NPR-PACS groups, respectively (p = 0.36). IOS was abnormal in 28.6% and 66.7% of participants in the PR-PACS and NPR-PACS groups, respectively (p = 0.003). LUS was altered in 39.4% and 43.8% of the participants in the PR-PACS and NPR-PACS groups, respectively (p = 0.72). The 6-min walk distance (6MWD) was greater in the PR-PACS group than in the NPR-PACS group (p = 0.001]. HD was observed in 6.1% and 37.5% of participants in the PR-PACS and NPR-PACS groups, respectively, with a significant difference in ΔIC (p<0.001). The 6MWD correlated significantly with several IOS parameters and with ΔIC. CONCLUSIONS Patients with PACS undergoing PR perform better in the 6MWT, with a higher 6MWD and less HD. In these patients, IOS is able to distinguish the effects of PR that are not differentiated by spirometry or LUS. Furthermore, the better the respiratory mechanics assessed by IOS and the less DH there was, the higher the performance in the 6MWT.
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Affiliation(s)
- Renan Pereira Campos
- Rehabilitation Sciences Post-Graduation Programme, Augusto Motta University Centre (UNISUAM), Rio de Janeiro, Brazil
| | | | | | | | - Samantha Gomes de Alegria
- Pos-Graduation Programme in Medical Sciences, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
| | - Rosemere Saldanha Xavier
- Local Development Post-Graduation Programme, Augusto Motta University Center (UNISUAM), Rio de Janeiro, Brazil
| | - Agnaldo José Lopes
- Rehabilitation Sciences Post-Graduation Programme, Augusto Motta University Centre (UNISUAM), Rio de Janeiro, Brazil
- Pos-Graduation Programme in Medical Sciences, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
- Local Development Post-Graduation Programme, Augusto Motta University Center (UNISUAM), Rio de Janeiro, Brazil
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Ee WW. Journal club. Thorax 2023; 78:1262. [PMID: 37984990 DOI: 10.1136/thorax-2023-221096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Affiliation(s)
- Wei Wei Ee
- NIHR Academic Clinical Fellow in Respiratory Medicine, King's College London, London, UK
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Rinaldo RF, Mondoni M, Baccelli A, Marchetti F, Re B, Degrassi M, Parazzini EM, Guazzi M, Di Marco F, Centanni S. SARS-CoV-2 infection sequelae on exercise response: persistent or reversible? A 2-year perspective. ERJ Open Res 2023; 9:00234-2023. [PMID: 37389900 PMCID: PMC10291727 DOI: 10.1183/23120541.00234-2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 06/02/2023] [Indexed: 07/01/2023] Open
Abstract
Post-COVID-19 exercise capacity sequalae on oxygen utilisation and ventilatory efficiency improve over time in most patients. Cardiopulmonary exercise testing is a valuable tool to identify those who may benefit from specific rehabilitative interventions. https://bit.ly/3qFd97x.
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Affiliation(s)
- Rocco Francesco Rinaldo
- Respiratory Unit, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, University of Milan, Milan, Italy
| | - Michele Mondoni
- Respiratory Unit, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, University of Milan, Milan, Italy
| | - Andrea Baccelli
- Respiratory Unit, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, University of Milan, Milan, Italy
| | - Francesca Marchetti
- Respiratory Unit, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, University of Milan, Milan, Italy
| | - Beatrice Re
- Respiratory Unit, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, University of Milan, Milan, Italy
| | - Mauro Degrassi
- Respiratory Unit, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, University of Milan, Milan, Italy
| | - Elena Maria Parazzini
- Respiratory Unit, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, University of Milan, Milan, Italy
| | - Marco Guazzi
- Cardiology Unit, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, University of Milan, Milan, Italy
| | - Fabiano Di Marco
- Respiratory Unit, ASST Papa Giovanni XXIII Hospital, Department of Health Sciences, University of Milan, Bergamo, Italy
| | - Stefano Centanni
- Respiratory Unit, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, University of Milan, Milan, Italy
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