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