Hoyer Robert J, Arora Amindra S, Baron Todd H
Department of Internal Medicine and Division of Gastroenterology and Hepatology, Mayo Clinic, Mayo Clinic Foundation, Saint Mary's Hospital, Rochester, Minnesota 55905, USA.
Gastrointest Endosc. 2005 Nov;62(5):802-5. doi: 10.1016/j.gie.2005.07.038.