Rhim Andrew D, Kochman Michael L
Gastroenterology Division, Department of Medicine, Hospital of the University of Pennsylvania, University of Pennsylvania Health System, Philadelphia, Pennsylvania 19104, USA.
Clin Gastroenterol Hepatol. 2008 Jul;6(7):741-5. doi: 10.1016/j.cgh.2008.02.059. Epub 2008 Jun 10.