Friedman Lawrence S
Department of Medicine, Harvard Medical School, Boston, Massachusetts; Department of Medicine, Tufts University School of Medicine, Boston, Massachusetts; Department of Medicine, Newton-Wellesley Hospital, Newton, Massachusetts; Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts.
Gastroenterology. 2014 Mar;146(3):599-601. doi: 10.1053/j.gastro.2014.01.037. Epub 2014 Jan 22.