1. Department of Tuberculosis and Lung Diseases, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
2. Department of Pulmonary Functional Exploration, University Medical Center at Ho Chi Minh City, Ho Chi Minh City, Vietnam
3. Department of Internal Medicine, Ha Noi Medical University, Ha Noi City, Vietnam
4. Respiratory Center, Bach Mai Hospital, Ha Noi City, Vietnam
5. AP-HP, Hôpital Cochin, Service de Physiologie-Explorations Fonctionnelles, Paris, France
6. Tam Anh General Hospital, Ha Noi City, Vietnam