Barkin Jamie S, O'Loughlin Colm
University of Miami, School of Medicine/Mount Sinai Medical Center, Division of Gastroenterology, 4300 Alton Road, Miami Beach, FL 33140, USA.
Gastrointest Endosc Clin N Am. 2004 Jan;14(1):61-5. doi: 10.1016/j.giec.2003.10.016.