Behari Jaideep, Schoen Robert E, Blodgett Todd M, Federle Michael P
Department of Medicine, Division of Gastroenterology, Hepatology, and Nutrition, University of Pittsburgh School of Medicine, Pennsylvania, USA.
Gastrointest Endosc. 2005 May;61(6):733. doi: 10.1016/s0016-5107(05)00079-9.