1. Department of Medicine, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee, USA
2. Department of Medicine, Division of Gastroenterology, University of California, San Diego, La Jolla, California, USA
3. Department of Medicine, NAFLD Research Center, University of California, San Diego, La Jolla, California, USA
4. Department of Medicine, Division of Epidemiology, University of California, San Diego, La Jolla, California, USA