McCullough Russell Wade, Afzal Zahid Ahmed, Saifuddin Tahira N m i, Alba Laura M, Khan Abdul Haleem
University of Missouri-Kansas City, Truman Medical Center, Kansas City, Missouri 64108, USA.
Gastrointest Endosc. 2004 Jan;59(1):150-2. doi: 10.1016/s0016-5107(03)02370-8.