Head, Department of Respiratory Allergy & Applied Immunology Director Vallabhbhai Patel Chest Institute, University of Delhi, Delhi - 110007
Head, Dept. of Pulmonary Medicine Chandigarh Govt. Medical College Chandigarh
Asst. Professor, Dept, of Pathology Vallabhbhal Patel Chest Institute University of Delhi, Delhi
Head, Dept. of Medicine All India Institute of Medical Sciences Ansari Nagar, New Delhi