Kesari Anand, Bobba Ravi K, Arsura Edward L
Division of Gastroenterology and Department of Internal Medicine, Veterans Affairs Medical Center, University of Virginia, Roanoke-Salem Program, Salem, Virginia 24153, USA.
Gastrointest Endosc. 2005 Nov;62(5):796-7. doi: 10.1016/j.gie.2005.06.022.