Shaib Y H, Rabaa E, Feddersen R M, Jamal M M, Qaseem T
Department of Internal Medicine, Division of Gastroenterology, University of New Mexico Health Sciences Center, 2211 Lomas Blvd. NE, Albuquerque, NM 87131, USA.
Gastrointest Endosc. 2001 Oct;54(4):527-30. doi: 10.1067/mge.2001.116461.