1. NAFLD Research Center, Department of Medicine, University of California at San Diego; La Jolla CA
2. Université Lyon 1, Hospices Civils de Lyon; Lyon France
3. Division of Gastroenterology, Department of Medicine; La Jolla CA
4. Liver Imaging Group, Department of Radiology; University of California at San Diego; La Jolla CA
5. Division of Epidemiology, Department of Family and Preventive Medicine; University of California at San Diego; La Jolla CA