Institution: | 1. Division of Gastroenterology, University of Michigan, Ann Arbor, Michigan;3. Division of Gastroenterology, Augusta University, Augusta, Georgia;4. Division of Gastroenterology, Stanford University, Stanford, California;6. University of North Carolina, Charlotte, North Carolina;5. Section of Gastroenterology, Texas Tech University, El Paso, Texas;7. Division of Gastroenterology, Indiana University, Indianapolis, Indiana;12. Section of Gastroenterology, Temple University, Philadelphia, Pennsylvania;8. Department of Biostatistics, University of Buffalo, Buffalo, New York;10. Division of Gastroenterology, Massachusetts General Hospital, Boston, Massachusetts |