Widmer Jessica, Stavropoulos Stavros, Friedel David
Division of Gastroenterology, Department of Medicine, Winthrop University Hospital, Mineola, New York, USA.
Clin Gastroenterol Hepatol. 2011 Apr;9(4):A18. doi: 10.1016/j.cgh.2010.09.005. Epub 2010 Sep 17.