Farooq Farees T, Wong Richard C K, Yang Peter, Post Anthony B
Division of Gastroenterology, Department of Medicine, University Hospitals Case Medical Center, Cleveland, Ohio 44106-5066, USA.
Gastrointest Endosc. 2007 Jun;65(7):1090-2. doi: 10.1016/j.gie.2006.10.006. Epub 2007 Apr 23.