Affiliation: | Current affiliations: Division of Gastrointestinal and Liver Diseases (J.L.B.), University of Southern California, Keck School of Medicine, Los Angeles, California, Division of Gastroenterology and Hepatology (S.W.B.), University of Colorado Denver Health Sciences Center, Aurora, Colorado, Division of Gastroenterology and Hepatology (K.C.B., J.W.O.), University of California, San Francisco, San Francisco, California, USA |