Affiliation: | Current affiliations: Division of Gastroenterology (C.C.T., M.R.), Brigham & Women's Hospital, Harvard Medical School, Boston, Massachusetts, Department of Surgery (N.J.S., E.S.H.), Northwestern University Feinberg School of Medicine, Chicago, Illinois, Department of Gastroenterology and Hepatology (R.I.R.), Dartmouth Hitchcock Medical Center, Lebanon, New Hampshire, Department of Surgery (L.L.S.), Legacy Health System, Portland, Oregon, USA |