1. Division of Gastroenterology and Hepatology, Department of Medicine, University of California San Francisco , San Francisco, California , USA
2. Department of Veterans Affairs Medical Center and Department of Medicine, University of California San Francisco , San Francisco, California , USA
3. Division of Gastroenterology and Liver Diseases, University of Southern California , Los Angeles, California , USA
4. Division of Experimental Medicine, University of California San Francisco , San Francisco, California , USA
5. Department of Epidemiology and Biostatistics, University at Albany, State University of New York , Rensselaer, New York , USA
6. Department of Medicine, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina , USA
7. Department of Medicine, Miller School of Medicine, University of Miami , Miami, Florida , USA
8. Department of Medicine, CORE Center/Stroger Hospital of Cook County , Chicago, Illinois , USA
9. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland , USA
10. School of Nursing, Medicine and Population Health, University of Mississippi Medical Center , Jackson, Mississippi , USA
11. Department of Obstetrics and Gynecology, Downstate Health Sciences University, State University of New York , Brooklyn, New York , USA
12. Department of Medicine, School of Medicine, Emory University , Atlanta, Georgia , USA
13. Department of Medicine, Georgetown University Medical Center , Washington, DC , USA
14. Department of Medicine, Albert Einstein College of Medicine , Bronx, New York , USA