Institution: | 1.Division of Surgical Gastroenterology, School of Digestive and Liver Diseases,Institute of Postgraduate Medical Education and Research,Kolkata,India;2.Division of Gastroenterology, School of Digestive and Liver Diseases,Institute of Postgraduate Medical Education and Research,Kolkata,India;3.Division of Pathology, School of Digestive and Liver Diseases,Institute of Postgraduate Medical Education and Research,Kolkata,India |