1. Department of Medicine, Patliputra Medical College and Hospital, Saraidhela, Post Office- Koyla Nagar, Dhanbad, Jharkhand, India
2. Department of Medicine, Assam Medical College and Hospital, Dibrugarh, Assam 786002, India
3. ART Centre, Patliputra Medical College and Hospital Saraidhela, Post Office-Koyla Nagar, Dhanbad, Jharkhand, India