1. Department of Medicine, Nagaon Medical College and Hospital, Nagaon, Assam, India
2. Department of Gastroenterology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
3. Department of Gastroenterology, Christian Medical College, Vellore, India
4. Department of Gastroenterology and Human Nutrition, All India Institute of Medical Science, Delhi, India
5. Institute of Gastrosciences and Liver, Apollo Multispecialty Hospitals, Kolkata, India
6. Director of Gastroenterology, Fortis Hospital, Mohali, India