Chatrath Hemant, Keilin Steven, Attar Bashar M
Department of Medicine, John H. Stroger Jr. Hospital of Cook County, Rush University, 1901 W Harrison St, Chicago, IL 60612, USA.
Dig Dis Sci. 2009 Jan;54(1):168-73. doi: 10.1007/s10620-008-0310-2. Epub 2008 May 14.