Graham Deborah B, Jager David L, Borum Marie L
Division of Gastroenterology and Liver Diseases, The George Washington University Hospital, 2150 Pennsylvania Avenue NW, No. 3-405, Washington, DC 20037, USA.
Dig Dis Sci. 2006 Nov;51(11):2062-3. doi: 10.1007/s10620-006-9533-2. Epub 2006 Sep 29.