Somsouk Ma, Shergill Amandeep K, Grenert James P, Harris Hobart, Cello John P, Shah Janak N
Department of Medicine, Division of Gastroenterology, University of California, San Francisco, California 94121, USA.
Gastrointest Endosc. 2008 Jul;68(1):186-7. doi: 10.1016/j.gie.2007.11.019. Epub 2008 Mar 4.