1. Associate Scientist, Population Studies Unit, Indian Statistical Institute, Kolkata, West Bengal, India
2. Department of Paediatrics, MGM Medical College and LSK Hospital, Kishanganj, Bihar, India
3. Department of Community Medicine, MGM Medical College and LSK Hospital, Kishanganj, Bihar, India
4. Department of Biochemistry, Midnapore Medical College, Paschim Medinipur, West Bengal, India