Farraye Francis A, Odze Robert D, Eaden Jayne, Itzkowitz Steven H
Section of Gastroenterology, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts, USA.
Gastroenterology. 2010 Feb;138(2):746-74, 774.e1-4; quiz e12-3. doi: 10.1053/j.gastro.2009.12.035.