1. Department of Gastroenterology and Human Nutrition Unit All India Institute of Medical Sciences New Delhi India
2. Department of Community Medicine All India Institute of Medical Sciences New Delhi India
3. Department of Gastroenterology Post graduate Institute of Medical Education and Research Chandigarh India
4. Department of Medicine Sardar Patel Medical College Bikaner
5. Department of Pathology All India Institute of Medical Sciences New Delhi India
6. Department of Gastroenterology SRM Institute of Medical Sciences Chennai India