1. Department of Biotechnology, Panjab University, Chandigarh, India.
2. Department of Chest and Infectious Diseases, Government Medical College Hospital, Chandigarh, India.
3. Department of Pulmonary Medicine, PGIMER, Chandigarh, India.
4. T.B. and Chest Disease Hospital, Government Medical College Patiala, Punjab, India.
5. Genetic and Molecular Epidemiology Unit, Fondazione Policlinico IRCCS, Milan, Italy.