Sifford Michael, Koch Alvaro, Lee Eun, Peña Luis R
University of Kentucky Chandler Medical Center, Division of Digestive Diseases and Nutrition, 800 Rose Street, Room MN 649, Lexington, Kentucky 40536-0298, USA.
Dig Dis Sci. 2007 Nov;52(11):3016-8. doi: 10.1007/s10620-006-9149-6. Epub 2007 May 26.