Moyer Matthew T, Gaffney Ryan R, Mathew Abraham
Division of Gastroenterology/Hepatology, Department of Internal Medicine, Penn State Hershey Medical Center, Hershey, Pennsylvania 17033-0850, USA.
Gastrointest Endosc. 2011 Feb;73(2):395-7. doi: 10.1016/j.gie.2010.07.008. Epub 2010 Sep 25.