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Al-Moamary MS, Alhaider SA, Allehebi R, Idrees MM, Zeitouni MO, Al Ghobain MO, Alanazi AF, Al-Harbi AS, Yousef AA, Alorainy HS, Al-Hajjaj MS. The Saudi initiative for asthma - 2024 update: Guidelines for the diagnosis and management of asthma in adults and children. Ann Thorac Med 2024; 19:1-55. [PMID: 38444991 PMCID: PMC10911239 DOI: 10.4103/atm.atm_248_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 10/31/2023] [Indexed: 03/07/2024] Open
Abstract
The Saudi Initiative for Asthma 2024 (SINA-2024) is the sixth version of asthma guidelines for the diagnosis and management of asthma for adults and children that was developed by the SINA group, a subsidiary of the Saudi Thoracic Society. The main objective of the SINA is to have guidelines that are up-to-date, simple to understand, and easy to use by healthcare workers dealing with asthma patients. To facilitate achieving the goals of asthma management, the SINA Panel approach is mainly based on the assessment of symptom control and risk for both adults and children. The approach to asthma management is aligned for age groups: adults, adolescents, children aged 5-12 years, and children aged <5 years. SINA guidelines have focused more on personalized approaches reflecting a better understanding of disease heterogeneity with the integration of recommendations related to biologic agents, evidence-based updates on treatment, and the role of immunotherapy in management. The medication appendix has also been updated with the addition of recent evidence, new indications for existing medication, and new medications. The guidelines are constructed based on the available evidence, local literature, and the current situation at national and regional levels. There is also an emphasis on patient-doctor partnership in the management that also includes a self-management plan.
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Affiliation(s)
- Mohamed Saad Al-Moamary
- Department of Medicine, College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Sami A. Alhaider
- Department of Pediatrics, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Riyad Allehebi
- Department of Medicine, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Majdy M. Idrees
- Department of Medicine, Respiratory Division, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Mohammed O. Zeitouni
- Department of Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Mohammed O. Al Ghobain
- Department of Medicine, College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Abdullah F. Alanazi
- Department of Medicine, College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Adel S. Al-Harbi
- Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Abdullah A. Yousef
- Department of Pediatrics, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Hassan S. Alorainy
- Department of Respiratory Care, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Mohamed S. Al-Hajjaj
- Department of Paediatrics, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
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Tosca MA, Di Cicco ME, Leone M, Scavone M, Licari A. Controversies in the treatment of mild asthma. What novelties and practical implications? Pediatr Allergy Immunol 2022; 33 Suppl 27:11-14. [PMID: 35080294 PMCID: PMC9303533 DOI: 10.1111/pai.13618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/17/2021] [Accepted: 08/06/2021] [Indexed: 11/27/2022]
Abstract
Mild asthma is prevalent in childhood and causes as many as 30%-40% asthma exacerbations requiring emergency visits. The management of "intermittent" and "mild persistent" asthma phenotypes is still a matter of debate, even if the role of inhaled corticosteroids, both continuous and intermittent, is a cornerstone in this field. Recent updates of the guidelines on the strategies to manage these patients are coming, since the role of inflammation in these asthma phenotypes is crucial, as well as the potential side effect and risks of short-acting beta 2 agonists overuse, prescribed as the only "as-needed" treatments. In this paper, we overview the new (r)evolution regarding intermittent and mild persistent asthma management.
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Affiliation(s)
| | - Maria Elisa Di Cicco
- Department of Clinical and Experimental Medicine, Section of Pediatrics, University of Pisa, Pisa, Italy
| | | | - Maria Scavone
- Neonatal Intensive Care Unit, San Carlo Hospital, Potenza, Italy
| | - Amelia Licari
- Pediatric Clinic, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
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Baggott C, Hansen P, Hancox RJ, Hardy JK, Sparks J, Holliday M, Weatherall M, Beasley R, Reddel HK, Fingleton J. What matters most to patients when choosing treatment for mild-moderate asthma? Results from a discrete choice experiment. Thorax 2020; 75:842-848. [PMID: 32719055 DOI: 10.1136/thoraxjnl-2019-214343] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 05/09/2020] [Accepted: 06/19/2020] [Indexed: 11/04/2022]
Abstract
BACKGROUND An as-needed combination preventer and reliever regimen was recently introduced as an alternative to conventional daily preventer treatment for mild asthma. In a subgroup analysis of the PRACTICAL study, a pragmatic randomised controlled trial of budesonide-formoterol reliever therapy versus maintenance budesonide plus terbutaline reliever therapy in adults with mild asthma, we recently reported that about two-thirds preferred as-needed combination preventer and reliever therapy. The aim of this study was to determine the relative importance of attributes associated with these two asthma therapies in this subgroup of participants who indicated their preferred treatment in the PRACTICAL study. METHODS At their final study visit, a subgroup of participants indicated their preferred treatment and completed a discrete choice experiment using the Potentially All Pairwise RanKings of all possible Alternatives method and 1000minds software. Treatment attributes and their levels were selected from measurable study outcomes, and included: treatment regimen, shortness of breath, steroid dose and likelihood of asthma flare-up. RESULTS The final analysis dataset included 288 participants, 64% of whom preferred as-needed combination preventer and reliever. Of the attributes, no shortness of breath and lowest risk of asthma flare-up were ranked highest and second highest, respectively. However, the relative importance of the other two attributes varied by preferred therapy: treatment regimen was ranked higher by participants who preferred as-needed treatment than by participants who preferred maintenance treatment. CONCLUSIONS Knowledge of patient preferences for treatment attributes together with regimen characteristics can be used in shared decision-making regarding choice of treatment for patients with mild-moderate asthma. TRIAL REGISTRATION NUMBER ACTRN12616000377437.
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Affiliation(s)
- Christina Baggott
- Asthma Programme, Medical Research Institute of New Zealand, Wellington, New Zealand
| | - Paul Hansen
- Economics, University of Otago, Dunedin, New Zealand
| | - Robert J Hancox
- Preventive and Social Medicine, University of Otago, Dunedin, New Zealand.,Respiratory Medicine, Waikato Hospital, Hamilton, Waikato, New Zealand
| | - Jo Katherine Hardy
- Asthma Programme, Medical Research Institute of New Zealand, Wellington, New Zealand
| | - Jenny Sparks
- Asthma Programme, Medical Research Institute of New Zealand, Wellington, New Zealand
| | - Mark Holliday
- Asthma Programme, Medical Research Institute of New Zealand, Wellington, New Zealand
| | - Mark Weatherall
- Medicine, University of Otago Wellington, Wellington, New Zealand
| | - Richard Beasley
- Asthma Programme, Medical Research Institute of New Zealand, Wellington, New Zealand.,Respiratory Medicine, Capital and Coast District Health Board, Wellington, New Zealand
| | - Helen K Reddel
- Woolcock Institute of Medical Research, University of Sydney, Glebe, New South Wales, Australia
| | - James Fingleton
- Asthma Programme, Medical Research Institute of New Zealand, Wellington, New Zealand.,Respiratory Medicine, Capital and Coast District Health Board, Wellington, New Zealand
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Cusack RP, Satia I, O'Byrne PM. Asthma maintenance and reliever therapy: Should this be the standard of care? Ann Allergy Asthma Immunol 2020; 125:150-155. [PMID: 32339657 DOI: 10.1016/j.anai.2020.04.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/30/2020] [Accepted: 04/12/2020] [Indexed: 12/01/2022]
Abstract
OBJECTIVE The goal of asthma management is to achieve optimal asthma control, defined by the absence of daytime symptoms, nighttime waking, reliever use, functional limitation, and lung function stability, and to also reduce the future risks of asthma exacerbations, deterioration in lung function, and the medication's adverse effects. The most widely used maintenance therapy is inhaled corticosteroids (ICSs). This review considered the evidence in which the combination of the ICS budesonide and the rapid-onset long-acting β-agonist (LABA) formoterol can be used as a standard of care for maintenance and reliever therapy in moderate to severe asthma. DATA SOURCES The archival literature of peer-reviewed studies on the efficacy and safety of budesonide-formoterol as maintenance and reliever therapy in moderate to severe asthma. RESULTS The ICS-LABA combination containing budesonide-formoterol reduces future risk of severe asthma exacerbations and provides similar levels of day-to-day asthma control when compared with using high-dose ICS alone, or combination ICS-LABA therapy and short-acting β2-agonist as a reliever. CONCLUSION Budesonide-formoterol as a single combination maintenance and reliever inhaler is effective in reducing asthma exacerbation risk, requires a lower maintenance dose of ICS, and results in a simplified approach to asthma management.
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Affiliation(s)
- Ruth P Cusack
- Firestone Institute for Respiratory Health, St. Joseph's Hospital, McMaster University, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Imran Satia
- Firestone Institute for Respiratory Health, St. Joseph's Hospital, McMaster University, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Paul M O'Byrne
- Firestone Institute for Respiratory Health, St. Joseph's Hospital, McMaster University, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada.
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5
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Baggott C, Reddel HK, Hardy J, Sparks J, Holliday M, Corin A, Montgomery B, Reid J, Sheahan D, Hancox RJ, Weatherall M, Beasley R, Fingleton J. Patient preferences for symptom-driven or regular preventer treatment in mild to moderate asthma: findings from the PRACTICAL study, a randomised clinical trial. Eur Respir J 2020; 55:13993003.02073-2019. [PMID: 32029450 DOI: 10.1183/13993003.02073-2019] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 01/22/2020] [Indexed: 01/17/2023]
Abstract
Symptom-driven low-dose inhaled corticosteroid-formoterol is safe and effective in mild asthma and has been recommended as one of the preferred treatment regimens at steps 1 and 2 in the 2019 update of the Global Initiative for Asthma. However, there are no data on patient preferences for this regimen.A subgroup of participants in the PRACTICAL study (ACTRN12616000377437), a randomised controlled trial comparing symptom-driven budesonide-formoterol with maintenance budesonide plus as-needed terbutaline completed a survey on treatment preferences, satisfaction, beliefs and experience at their final study visit.306 (75%) out of 407 eligible participants completed the survey. Regimen preference was strongly associated with randomised treatment, as were preferences for and beliefs about preventer inhaler use. Combination preventer and reliever as-needed therapy was preferred by 135 (90%, 95% CI 85.2-94.8%) out of 150 who were randomised to as-needed budesonide-formoterol, and by 63 (40%, 95% CI 32.7-48.1%) out of 156 who were randomised to maintenance budesonide. By contrast, twice-daily preventer inhaler with a reliever inhaler as required was preferred by 15 (10%) out of 150 of those randomised to as-needed budesonide-formoterol and 93 (60%) out of 156 of those randomised to maintenance budesonide. Satisfaction with all study inhalers was high. Of patients randomised to as-needed budesonide-formoterol 92% (n=138) were confident using it as a reliever at the end of the study.Although most participants preferred the regimen to which they had been randomised, this association was much stronger for those randomised to budesonide-formoterol as needed, indicating that most patients preferred as-needed corticosteroid-formoterol therapy if they had experienced it.
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Affiliation(s)
| | - Helen K Reddel
- Woolcock Institute of Medical Research, University of Sydney, Sydney, Australia
| | - Jo Hardy
- Medical Research Institute of New Zealand, Wellington, New Zealand
| | - Jenny Sparks
- Medical Research Institute of New Zealand, Wellington, New Zealand
| | - Mark Holliday
- Medical Research Institute of New Zealand, Wellington, New Zealand
| | | | | | - Jim Reid
- RMC Research Ltd, Dunedin, New Zealand
| | | | - Robert J Hancox
- Waikato Hospital, Hamilton, New Zealand.,University of Otago, Dunedin, New Zealand
| | | | - Richard Beasley
- Medical Research Institute of New Zealand, Wellington, New Zealand.,Capital and Coast District Health Board, Wellington, New Zealand
| | - James Fingleton
- Medical Research Institute of New Zealand, Wellington, New Zealand.,Capital and Coast District Health Board, Wellington, New Zealand
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Hardy J, Baggott C, Fingleton J, Reddel HK, Hancox RJ, Harwood M, Corin A, Sparks J, Hall D, Sabbagh D, Mane S, Vohlidkova A, Martindale J, Williams M, Shirtcliffe P, Holliday M, Weatherall M, Beasley R. Budesonide-formoterol reliever therapy versus maintenance budesonide plus terbutaline reliever therapy in adults with mild to moderate asthma (PRACTICAL): a 52-week, open-label, multicentre, superiority, randomised controlled trial. Lancet 2019; 394:919-928. [PMID: 31451207 DOI: 10.1016/s0140-6736(19)31948-8] [Citation(s) in RCA: 154] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 08/01/2019] [Accepted: 08/01/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND In adults with mild asthma, a combination of an inhaled corticosteroid with a fast-onset long-acting β-agonist (LABA) used as reliever monotherapy reduces severe exacerbations compared with short-acting β-agonist (SABA) reliever therapy. We investigated the efficacy of combination budesonide-formoterol reliever therapy compared with maintenance budesonide plus as-needed terbutaline. METHODS We did a 52-week, open-label, parallel-group, multicentre, superiority, randomised controlled trial at 15 primary care or hospital-based clinical trials units and primary care practices in New Zealand. Participants were adults aged 18-75 years with a self-reported doctor's diagnosis of asthma who were using SABA for symptom relief with or without maintenance low to moderate doses of inhaled corticosteroids in the previous 12 weeks. We randomly assigned participants (1:1) to either reliever therapy with budesonide 200 μg-formoterol 6 μg Turbuhaler (one inhalation as needed for relief of symptoms) or maintenance budesonide 200 μg Turbuhaler (one inhalation twice daily) plus terbutaline 250 μg Turbuhaler (two inhalations as needed). Participants and investigators were not masked to group assignment; the statistician was masked for analysis of the primary outcome. Six study visits were scheduled: randomisation, and weeks 4, 16, 28, 40, and 52. The primary outcome was the number of severe exacerbations per patient per year analysed by intention to treat (severe exacerbations defined as use of systemic corticosteroids for at least 3 days because of asthma, or admission to hospital or an emergency department visit because of asthma requiring systemic corticosteroids). Safety analyses included all participants who had received at least one dose of study treatment. This trial is registered with the Australian New Zealand Clinical Trials Registry, number ACTRN12616000377437. FINDINGS Between May 4, 2016, and Dec 22, 2017, we assigned 890 participants to treatment and included 885 eligible participants in the analysis: 437 assigned to budesonide-formoterol as needed and 448 to budesonide maintenance plus terbutaline as needed. Severe exacerbations per patient per year were lower with as-needed budesonide-formoterol than with maintenance budesonide plus terbutaline as needed (absolute rate per patient per year 0·119 vs 0·172; relative rate 0·69, 95% CI 0·48-1·00; p=0·049). Nasopharyngitis was the most common adverse event in both groups, occurring in 154 (35%) of 440 patients receiving as-needed budesonide-formoterol and 144 (32%) of 448 receiving maintenance budesonide plus terbutaline as needed. INTERPRETATION In adults with mild to moderate asthma, budesonide-formoterol used as needed for symptom relief was more effective at preventing severe exacerbations than maintenance low-dose budesonide plus as-needed terbutaline. The findings support the 2019 Global Initiative for Asthma recommendation that inhaled corticosteroid-formoterol reliever therapy is an alternative regimen to daily low-dose inhaled corticosteroid for patients with mild asthma. FUNDING Health Research Council of New Zealand.
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Affiliation(s)
- Jo Hardy
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand
| | - Christina Baggott
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand
| | - James Fingleton
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand; Capital and Coast District Health Board, Wellington, New Zealand
| | - Helen K Reddel
- Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia
| | - Robert J Hancox
- Waikato Hospital, Hamilton, New Zealand; University of Otago, Dunedin, New Zealand
| | | | | | - Jenny Sparks
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand
| | - Daniela Hall
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand
| | - Doñah Sabbagh
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand
| | - Saras Mane
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand
| | | | - John Martindale
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand
| | - Mathew Williams
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand
| | | | - Mark Holliday
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand
| | | | - Richard Beasley
- Medical Research Institute of New Zealand, Newtown, Wellington, New Zealand; Capital and Coast District Health Board, Wellington, New Zealand.
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Muneswarao J, Hassali MA, Ibrahim B, Saini B, Ali IAH, Verma AK. It is time to change the way we manage mild asthma: an update in GINA 2019. Respir Res 2019; 20:183. [PMID: 31412856 PMCID: PMC6694574 DOI: 10.1186/s12931-019-1159-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 08/08/2019] [Indexed: 12/27/2022] Open
Abstract
Asthma is a heterogeneous lung disease, usually characterised by chronic airway inflammation. Although evidence-based treatments are available in most countries, asthma control remains suboptimal, and asthma-related deaths continue to be an ongoing concern. Generally, it is believed that between 50 to 75% of patients with asthma can be considered as having mild asthma. Previous versions of Global Initiative for Asthma (GINA) suggested that mild asthma in adults can be well managed with either reliever medications, for example, short-acting beta2 agonists (SABA) alone or with the additional use of controllers such as regular low-dose inhaled corticosteroids (ICS). Given the low frequency or non-bothersome nature of symptoms in mild asthma, patients’ adherence towards their controller medications, especially to ICS is usually not satisfactory. Such patients often rely on SABA alone to relieve symptoms, which may contribute to SABA over-reliance. Overuse of relievers such as SABAs has been associated with poor asthma outcomes, such as exacerbations and even deaths. The new GINA 2019 asthma treatment recommendations represent significant shifts in asthma management at Steps 1 and 2 of the 5 treatment steps. The report acknowledges an emerging body of evidence suggesting the non-safety of SABAs overuse in the absence of concomitant controller medications, therefore does not support SABA-only therapy in mild asthma and has included new off-label recommendations such as symptom-driven (as-needed) low dose ICS-formoterol and “low dose ICS taken whenever SABA is taken”. The GINA 2019 report highlights significant updates in mild asthma management and these recommendations represent a clear deviation from decades of clinical practice mandating the use of symptom-driven SABA treatment alone in those with mild asthma. While the new inclusions of strategies such as symptom-driven (as-needed) ICS-formoterol and “ICS taken whenever SABA is taken” are based on several key trials, data in this context are still only emergent data, with clear superiority of as needed ICS-formoterol combinations over maintenance ICS regimens yet to be established for valid endpoints. Nevertheless, current and emerging data position the clinical asthma realm at a watershed moment with imminent changes for the way we manage mild asthma likely in going forward.
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Affiliation(s)
- Jaya Muneswarao
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia.
| | - Mohamed Azmi Hassali
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Baharudin Ibrahim
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Bandana Saini
- School of Pharmacy, The University of Sydney, Sydney, New South Wales, Australia
| | - Irfhan Ali Hyder Ali
- Respiratory Department, Hospital Pulau Pinang, Ministry of Health Malaysia, George Town, Penang, Malaysia
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Reddel HK, FitzGerald JM, Bateman ED, Bacharier LB, Becker A, Brusselle G, Buhl R, Cruz AA, Fleming L, Inoue H, Ko FWS, Krishnan JA, Levy ML, Lin J, Pedersen SE, Sheikh A, Yorgancioglu A, Boulet LP. GINA 2019: a fundamental change in asthma management. Eur Respir J 2019; 53:53/6/1901046. [DOI: 10.1183/13993003.01046-2019] [Citation(s) in RCA: 209] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 05/28/2019] [Indexed: 11/05/2022]
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Martin MJ, Harrison TW. Is it time to move away from short-acting beta-agonists in asthma management? Eur Respir J 2019; 53:53/4/1802223. [PMID: 30948504 DOI: 10.1183/13993003.02223-2018] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 02/14/2019] [Indexed: 11/05/2022]
Affiliation(s)
- Matthew J Martin
- The Asthma Centre, Nottingham NIHR Respiratory BRC, University of Nottingham, Nottingham City Hospital, Nottingham, UK
| | - Tim W Harrison
- The Asthma Centre, Nottingham NIHR Respiratory BRC, University of Nottingham, Nottingham City Hospital, Nottingham, UK
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Bateman ED, Reddel HK, O'Byrne PM, Barnes PJ, Zhong N, Keen C, Jorup C, Lamarca R, Siwek-Posluszna A, FitzGerald JM. As-Needed Budesonide-Formoterol versus Maintenance Budesonide in Mild Asthma. N Engl J Med 2018; 378:1877-1887. [PMID: 29768147 DOI: 10.1056/nejmoa1715275] [Citation(s) in RCA: 287] [Impact Index Per Article: 47.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Patients with mild asthma often rely on inhaled short-acting β2-agonists for symptom relief and have poor adherence to maintenance therapy. Another approach might be for patients to receive a fast-acting reliever plus an inhaled glucocorticoid component on an as-needed basis to address symptoms and exacerbation risk. METHODS We conducted a 52-week, double-blind, multicenter trial involving patients 12 years of age or older who had mild asthma and were eligible for treatment with regular inhaled glucocorticoids. Patients were randomly assigned to receive twice-daily placebo plus budesonide-formoterol (200 μg of budesonide and 6 μg of formoterol) used as needed or budesonide maintenance therapy with twice-daily budesonide (200 μg) plus terbutaline (0.5 mg) used as needed. The primary analysis compared budesonide-formoterol used as needed with budesonide maintenance therapy with regard to the annualized rate of severe exacerbations, with a prespecified noninferiority limit of 1.2. Symptoms were assessed according to scores on the Asthma Control Questionnaire-5 (ACQ-5) on a scale from 0 (no impairment) to 6 (maximum impairment). RESULTS A total of 4215 patients underwent randomization, and 4176 (2089 in the budesonide-formoterol group and 2087 in the budesonide maintenance group) were included in the full analysis set. Budesonide-formoterol used as needed was noninferior to budesonide maintenance therapy for severe exacerbations; the annualized rate of severe exacerbations was 0.11 (95% confidence interval [CI], 0.10 to 0.13) and 0.12 (95% CI, 0.10 to 0.14), respectively (rate ratio, 0.97; upper one-sided 95% confidence limit, 1.16). The median daily metered dose of inhaled glucocorticoid was lower in the budesonide-formoterol group (66 μg) than in the budesonide maintenance group (267 μg). The time to the first exacerbation was similar in the two groups (hazard ratio, 0.96; 95% CI, 0.78 to 1.17). The change in ACQ-5 score showed a difference of 0.11 units (95% CI, 0.07 to 0.15) in favor of budesonide maintenance therapy. CONCLUSIONS In patients with mild asthma, budesonide-formoterol used as needed was noninferior to twice-daily budesonide with respect to the rate of severe asthma exacerbations during 52 weeks of treatment but was inferior in controlling symptoms. Patients in the budesonide-formoterol group had approximately one quarter of the inhaled glucocorticoid exposure of those in the budesonide maintenance group. (Funded by AstraZeneca; SYGMA 2 ClinicalTrials.gov number, NCT02224157 .).
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Affiliation(s)
- Eric D Bateman
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
| | - Helen K Reddel
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
| | - Paul M O'Byrne
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
| | - Peter J Barnes
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
| | - Nanshan Zhong
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
| | - Christina Keen
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
| | - Carin Jorup
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
| | - Rosa Lamarca
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
| | - Agnieszka Siwek-Posluszna
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
| | - J Mark FitzGerald
- From the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.); Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J.); AstraZeneca Research and Development, Barcelona (R.L.); and AstraZeneca Research and Development, Warsaw, Poland (A.S.-P.)
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O'Byrne PM, FitzGerald JM, Bateman ED, Barnes PJ, Zhong N, Keen C, Jorup C, Lamarca R, Ivanov S, Reddel HK. Inhaled Combined Budesonide-Formoterol as Needed in Mild Asthma. N Engl J Med 2018; 378:1865-1876. [PMID: 29768149 DOI: 10.1056/nejmoa1715274] [Citation(s) in RCA: 369] [Impact Index Per Article: 61.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND In patients with mild asthma, as-needed use of an inhaled glucocorticoid plus a fast-acting β2-agonist may be an alternative to conventional treatment strategies. METHODS We conducted a 52-week, double-blind trial involving patients 12 years of age or older with mild asthma. Patients were randomly assigned to one of three regimens: twice-daily placebo plus terbutaline (0.5 mg) used as needed (terbutaline group), twice-daily placebo plus budesonide-formoterol (200 μg of budesonide and 6 μg of formoterol) used as needed (budesonide-formoterol group), or twice-daily budesonide (200 μg) plus terbutaline used as needed (budesonide maintenance group). The primary objective was to investigate the superiority of as-needed budesonide-formoterol to as-needed terbutaline with regard to electronically recorded weeks with well-controlled asthma. RESULTS A total of 3849 patients underwent randomization, and 3836 (1277 in the terbutaline group, 1277 in the budesonide-formoterol group, and 1282 in the budesonide maintenance group) were included in the full analysis and safety data sets. With respect to the mean percentage of weeks with well-controlled asthma per patient, budesonide-formoterol was superior to terbutaline (34.4% vs. 31.1% of weeks; odds ratio, 1.14; 95% confidence interval [CI], 1.00 to 1.30; P=0.046) but inferior to budesonide maintenance therapy (34.4% and 44.4%, respectively; odds ratio, 0.64; 95% CI, 0.57 to 0.73). The annual rate of severe exacerbations was 0.20 with terbutaline, 0.07 with budesonide-formoterol, and 0.09 with budesonide maintenance therapy; the rate ratio was 0.36 (95% CI, 0.27 to 0.49) for budesonide-formoterol versus terbutaline and 0.83 (95% CI, 0.59 to 1.16) for budesonide-formoterol versus budesonide maintenance therapy. The rate of adherence in the budesonide maintenance group was 78.9%. The median metered daily dose of inhaled glucocorticoid in the budesonide-formoterol group (57 μg) was 17% of the dose in the budesonide maintenance group (340 μg). CONCLUSIONS In patients with mild asthma, as-needed budesonide-formoterol provided superior asthma-symptom control to as-needed terbutaline, assessed according to electronically recorded weeks with well-controlled asthma, but was inferior to budesonide maintenance therapy. Exacerbation rates with the two budesonide-containing regimens were similar and were lower than the rate with terbutaline. Budesonide-formoterol used as needed resulted in substantially lower glucocorticoid exposure than budesonide maintenance therapy. (Funded by AstraZeneca; SYGMA 1 ClinicalTrials.gov number, NCT02149199 .).
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Affiliation(s)
- Paul M O'Byrne
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
| | - J Mark FitzGerald
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
| | - Eric D Bateman
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
| | - Peter J Barnes
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
| | - Nanshan Zhong
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
| | - Christina Keen
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
| | - Carin Jorup
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
| | - Rosa Lamarca
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
| | - Stefan Ivanov
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
| | - Helen K Reddel
- From the Firestone Institute for Respiratory Health, St. Joseph's Healthcare and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON (P.M.O.), and the Institute for Heart and Lung Health, University of British Columbia, Vancouver (J.M.F.) - both in Canada; the Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa (E.D.B.); Airway Disease Section, National Heart and Lung Institute, Imperial College, London (P.J.B.); State Key Laboratory of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China (N.Z.); AstraZeneca Research and Development, Gothenburg, Sweden (C.K., C.J., S.I.); AstraZeneca Research and Development, Barcelona (R.L.); and Woolcock Institute of Medical Research, University of Sydney, Sydney (H.K.R.)
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12
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Beasley R, Braithwaite I, Fingleton J, Weatherall M. The inhaled corticosteroid/long-acting β-agonist maintenance and reliever therapy regimen: where to from here? Eur Respir J 2018; 51:51/1/1702338. [PMID: 29301916 DOI: 10.1183/13993003.02338-2017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 11/20/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Richard Beasley
- Medical Research Institute of New Zealand, Wellington, New Zealand
| | | | - James Fingleton
- Medical Research Institute of New Zealand, Wellington, New Zealand
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