D'Souza Sharlene L, Davenport Matthew S, Elta Grace H
Division of Gastroenterology, Portland Veterans Administration Medical Center, Oregon Health & Science University, Portland, Oregon.
Division of Radiology, University of Michigan Health Systems, Michigan, USA.
Gastrointest Endosc. 2013 Dec;78(6):942-944. doi: 10.1016/j.gie.2013.07.052. Epub 2013 Sep 8.