1. Department of Pulmonary Medicine, Mahaveer Institute of Medical Science, Bhopal, Madhya Pradesh, India
2. Department of Pulmonary Medicine, AIIMS, Bhopal, Madhya Pradesh, India
3. Department of Respiratory Medicine, Sri Aurobindo Institute of Medical Sciences and Postgraduate Institute, Indore, Madhya Pradesh, India
4. Department of Community Medicine, Birsa Munda Government Medical College, Shahdol, Madhya Pradesh, India