Lee Joo Ahn, Taxier Michael S, Nicely Charles J
Departments of Internal Medicine, Gastroenterology, and Pathology, Riverside Methodist Hospital, Columbus, Ohio, USA.
Gastroenterology. 2008 Aug;135(2):e1-3. doi: 10.1053/j.gastro.2008.06.041. Epub 2008 Jul 11.