Kaushik Neeraj, Krasinskas Alyssa, Slivka Adam, McGrath Kevin
Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Pittsburgh School of Medicine, Pennsylvania, USA.
Gastrointest Endosc. 2004 Jul;60(1):102-3. doi: 10.1016/s0016-5107(04)01295-7.