Gunnerson A Clark, Diehl David L, Nguyen Viet-Nhan H, Shellenberger Matthew J, Blansfield Joseph
Department of Internal Medicine, Geisinger Medical Center, Danville, Pennsylvania, USA.
Gastrointest Endosc. 2012 Oct;76(4):900-4. doi: 10.1016/j.gie.2012.05.020. Epub 2012 Jul 27.