McGowan Christopher E, Carlsten James, Bhattacharya Baishali
Department of Internal Medicine, Rhode Island Hospital/Brown Medical School, Providence, Rhode Island, USA.
Gastrointest Endosc. 2008 Aug;68(2):370-1; discussion 371. doi: 10.1016/j.gie.2008.02.020. Epub 2008 Apr 18.