Bonin Eduardo A, Lopes Tercio L, Baron Todd H
Department of Medicine, Division of Gastroenterology & Hepatology, Mayo Clinic, Rochester, Minnesota 55905, USA.
Gastrointest Endosc. 2012 Aug;76(2):459-61. doi: 10.1016/j.gie.2011.07.074. Epub 2011 Nov 23.