Rustgi Anil K, Hecht Gail A
Division of Gastroenterology, Departments of Medicine and Genetics, Abramson Cancer Center, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Gastroenterology. 2011 Sep;141(3):789-92. doi: 10.1053/j.gastro.2011.07.024. Epub 2011 Jul 22.