Wani Sachin, Sayana Hari, Sharma Prateek
Division of Gastroenterology and Hepatology, Veterans Affairs Medical Center and University of Kansas School of Medicine, Kansas City, Missouri 64128-2295, USA.
Gastrointest Endosc. 2010 Jan;71(1):147-66. doi: 10.1016/j.gie.2009.07.026. Epub 2009 Oct 30.