1. Department of Medicine, Emory University , Atlanta, Georgia , USA
2. Department of Medicine, University of California San Francisco , San Francisco, California , USA
3. Department of Epidemiology and Biostatistics, University of California San Francisco , San Francisco, California , USA
4. Department of Epidemiology and Biostatistics, University at Albany, State University of New York , Rensselaer, New York , USA
5. Department of Medicine, Stroger Hospital, Cook County Health , Chicago, Illinois , USA
6. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland , USA
7. Department of Medicine, University of North Carolina , Chapel Hill, North Carolina , USA
8. Department of Obstetrics and Gynecology, State University of New York Downstate Health Sciences University , Brooklyn, New York , USA
9. Department of Medicine, Georgetown University Medical Center , Washington, District of Columbia , USA
10. Institute for Liver and Digestive Health, Division of Medicine, University College London , London , United Kingdom
11. Department of Pediatrics, University of Southern California , Los Angeles, California , USA
12. Infectious Disease Section, Department of Veterans Affairs Medical Center , San Francisco, California , USA