1. Clinic of Gastrointestinal, HPB, Multi Organ Transplant Surgery, Rajagiri Hospital, Kochi, India

2. Department of Surgical Gastroenterology, All India Institute of Medical Sciences, Patna, India

3. Department of Pathology, All India Institute of Medical Sciences, Patna, India

4. Department of Medical Gastroenterology, All India Institute of Medical Sciences, Patna, India

5. Department of Radiodiagnosis, All India Institute of Medical Sciences, Patna, India