Sheryl A Pfeil1, Helen M Shields2, Lori N Marks3, Suzanne Rose4. 1. The Ohio State University College of Medicine, Columbus, Ohio. Electronic address: Sheryl.pfeil@osumc.edu. 2. Harvard Medical School, Boston, Massachusetts. 3. American Gastroenterological Association, Bethesda, Maryland. 4. University of Connecticut School of Medicine, Farmington, Connecticut.