Hwang Elizabeth W, Cheung Lawrence, Mojtahed Amirkaveh, Cartwright Christine A
Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University Medical Center, 300 Pasteur Drive, Alway Building, M211, Stanford, CA 94305-5187, USA.
Dig Dis Sci. 2011 Mar;56(3):677-80. doi: 10.1007/s10620-010-1492-y. Epub 2010 Dec 14.