1. Department of Pulmonary Medicine, School of Chhindwara Institute of Medical Sciences, Chhindwara, Jabalpur Medical University, Madhya Pradesh, India
2. Department of Pulmonary Medicine, Amaltas Institute of Medical Sciences, Dewas, Jabalpur Medical University, Madhya Pradesh, India
3. Department of Medicine, School of Chhindwara Institute of Medical Sciences, Chhindwara, Jabalpur Medical University, Madhya Pradesh, India