1. Department of Gastroenterology, East Carolina University/Brody School of Medicine, Greenville, NC
2. Division of Gastroenterology, Hepatology and Motility, The University of Kansas School of Medicine, Kansas City, KS
3. Department of Medicine, University of Toledo Medical Center, Toledo, OH
4. Department of Gastroenterology, Mather Hospital/Hofstra University Zucker School of Medicine, Port Jefferson, NY