Nguyen Tu, Powell Anthony, Daugherty Tami
Division of Gastroenterology and Hepatology, Department of Medicine, Stanford University Medical Center, 300 Pasteur Drive, MC: 5187, Stanford, CA 94305-5187, USA.
Dig Dis Sci. 2010 Jan;55(1):8-10. doi: 10.1007/s10620-009-0912-3. Epub 2009 Aug 11.