1. IPCRG
2. Department of Respiratory Sciences, University of Leicester, Leicester, United Kingdom; Centre for Exercise and Rehabilitation Science, NIHR Leicester Biomedical Research Centre-Respiratory, University Hospitals of Leicester NHS Trust, Leicester, United Kingdom
3. International Primary Care Respiratory Group (IPCRG), London, UK; Charles Strut University and Australian National University, Canberra, Australia.
4. International Primary Care Respiratory Group (IPCRG), London, UK; Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga Portugal. ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
5. International Primary Care Respiratory Group (IPCRG), London, UK; Department of Social Medicine, University of Crete, Crete, Greece
6. University Hospitals of Leicester NHS Trust, Leicester, United Kingdom
7. Republican Research Center of Pulmonology and Rehabilitation, Ministry of Health, Bishkek, Kyrgyzstan; National Centre for Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
8. Makerere University Lung Institute, Kampala, Uganda
9. Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
10. Faculty of Allied Health Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
11. Department of Physiology, Faculty of Medicine, University of Jaffna, Sri Lanka
12. Central Chest Clinic, Colombo, Sri Lanka
13. Metro Centre for Respiratory Disease, Metro Hospital and Heart Institute, Uttar Pradesh, India
14. Symbiosis Medical College for Women and Symbiosis University Hospitals and Research Centre, Symbiosis International (Deemed) University, Pune, India