Liu E, Hoffenberg E J, Kaye R D, Sokol R J
Department of Pediatric Gastroenterology, Hepatology, and Nutrition, The Children's Hospital, University of Colorado School of Medicine, 1056 East 9th Ave., Denver, CO 80218, USA.
Gastrointest Endosc. 2001 Oct;54(4):533-5. doi: 10.1067/mge.2001.116462.