1. Department of Internal Medicine, Kangwon National University, Chuncheon, Korea
2. Department of Internal Medicine, Kangwon National University, Chuncheon, Korea, Adesh Institute of Medical Sciences and Research, Bathinda, India
3. Division of Respiratory Medicine, Department of Internal Medicine, Hokkaido University Hospital, Sapporo, Japan
4. Section of Respiratory Services and Physical Therapy and Rehabilitation Lung Center of the Philippines, Quezon City
5. College of Medicine and Philippine General Hospital, University of the Philippines, Manila, The Philippines
6. Department of Medicine, Penang Medical College, Penang, Malaysia
7. Taipei Medical University, Taipei, Taiwan
8. Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
9. Central Chest Clinic, National Hospital of Sri Lanka, Colombo
10. Respiratory Disease Treatment Unit, Teaching Hospital Kandy, Kandy, Sri Lanka
11. Department of Thoracic Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan
12. Department of Respiratory and Critical Care Medicine, Beijing China-Japan Friendship Hospital, Beijing
13. Beijing Institute of Respiratory Medicine, Department of Respiratory and Critical Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing
14. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
15. Respiratory Care Center, University Medical Center, Ho Chi Minh City, Viet Nam
16. Indian Coalition of Obstructive Lung Diseases Network, Pune, Maharashtra, India
17. Department of Respiratory and Critical Care Medicine, Tan Tock Seng Hospital, Singapore
18. Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul
19. Division of Allergy and Respiratory Diseases, Soon Chun Hyang University Hospital, Seoul
20. Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea