Wild Daniel, Fiore Joseph, Guelrud Moises
Division of Gastroenterology, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, USA.
Gastrointest Endosc. 2008 Oct;68(4):774-5; discussion 775. doi: 10.1016/j.gie.2008.02.086. Epub 2008 Jun 16.