Rehman Abdul, Peterson William L, Ahluwalia Jatinder P
Gastroenterology and Hepatology, Department of Medicine, Southern Illinois University School of Medicine, Springfield, IL 62794-9636 USA.
Gut. 2010 Oct;59(10):1330, 1346. doi: 10.1136/gut.2009.185843. Epub 2010 Aug 23.