1 Section of Gastroenterology, Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire.
2 Section of Gastroenterology, Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire; Dartmouth Geisel School of Medicine and the Dartmouth Institute for Health Policy and Clinical Practice, Lebanon, New Hampshire. Electronic address: audrey.h.calderwood@hitchcock.org.