Affiliation: | 1. Department of Medicine, Massachusetts General Hospital, Boston, MA, USA;2. VA Pittsburgh Healthcare System, Pittsburgh, PA, USA;3. Hamad Healthcare Quality Institute, Hamad Medical Corporation, Doha, Qatar;4. Division of Gastroenterology, Department of Medicine, Liver Center, Massachusetts General Hospital, Boston, MA, USA;5. Weill Cornell Medical College, Doha, Qatar;6. Weill Cornell Medical College, New York, NY, USA |