1. Department of Gastrointestinal Surgery, Institute of Postgraduate Medical Education and Research, Kolkata, West Bengal, India
2. Department of Gastrointestinal Pathology, Institute of Postgraduate Medical Education and Research, Kolkata, West Bengal, India
3. Department of Gastroenterology, Institute of Postgraduate Medical Education and Research, Kolkata, West Bengal, India
4. Department of Gastrointestinal Radiology, Institute of Postgraduate Medical Education and Research, Kolkata, West Bengal, India