1 Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.
2 Division of Gastroenterology, University of California Irvine, Irvine, CA, USA.
3 VA Long Beach Healthcare System, Long Beach, CA, USA.
4 Liver and Energy Metabolism Section, Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA.
5 Division of Gastroenterology and Hepatology, University of California San Diego, San Diego, CA, USA.
6 VA San Diego Healthcare System, San Diego, CA, USA.
7 Division of Endocrinology, Diabetes, and Metabolism, University of Florida, Gainesville, FL, USA.
8 Section of Gastroenterology and Hepatology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA.
9 VA Health Services Research and Development Service, Center for Innovations in Quality, Effectiveness, and Safety, Houston, TX, USA.
10 Michael E. DeBakey VA Medical Center, Houston, TX, USA.
11 Division of Gastroenterology and Hepatology, Mayo Clinic Arizona, Phoenix, AZ, USA.