1Division of Gastroenterology and Hepatology, Alameda Health System, Highland Hospital Campus, Oakland, California
2Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, California
3Division of Gastroenterology and Hepatology, Veterans Affairs Palo Alto Health Care System, Palo Alto, California
4Division of Gastroenterology, Department of Medicine, San Antonio Military Medical Center, Fort Sam Houston, Texas
5Center of Liver Diseases, Department of Medicine, Inova Fairfax Hospital, Falls Church, Virginia
6Betty and Guy Beatty Center for Integrated Research, Inova Health System, Falls Church, Virginia