1. Department of Pneumology, Allergy & Asthma Research Centre, Kolkata, India
2. Department of Chest Medicine, Murshidabad Medical College & Hospital, Berhampore, India
3. Department of Physiology, Uluberia College, Uluberia, India
4. ISGlobal, Barcelona, Spain
5. Universitat Pompeu Fabra (UPF), Barcelona, Spain
6. CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain