Petroniene Rima, Dubcenco Elena, Baker Jeffrey P, Warren Ralph E, Streutker Cathy J, Gardiner Geoffrey W, Jeejeebhoy Khursheed N
Division of Gastroenterology, St. Michael's Hospital and the University of Toronto, 30 Bond Street 3-035, Queen Wing, Toronto, Ontario M5B 1W8, Canada.
Gastrointest Endosc Clin N Am. 2004 Jan;14(1):115-27. doi: 10.1016/j.giec.2003.10.005.