1 Department of Medicine, Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York and, Gastroenterology Division, Hospital Beatriz Ângelo, Loures, Lisbon, Portugal.
2 University of Nevada, Reno School of Medicine and, VA Sierra Nevada Health Care System, Reno, Nevada.
3 Department of Medicine, Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York.