Affiliation: | Current affiliations: Divisions of Gastroenterology (K.D., R.S., J.D., G.K.D.), Surgical Gastroenterology (S.R., S.G.), Hepatology (K.D., A.C.), and GI Pathology (A.R.M.), School of Digestive and Liver Diseases, IPGME&R, Kolkata, West Bengal, India |