Parisian Keely R, Mcfarland Joel E, Shah Ashok N
Department of Internal Medicine, University of Rochester Medical Center, Rochester, New York, USA.
Clin Gastroenterol Hepatol. 2008 Mar;6(3):A24-A24.e1. doi: 10.1016/j.cgh.2007.12.010. Epub 2008 Feb 6.