1. Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois, Chicago, Chicago, Illinois.
2. Division of Infectious Diseases, Department of Medicine, Georgetown University Medical Center, Washington, D.C.
3. Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland.
4. Department of Medicine, University of California, San Francisco and San Francisco Veterans Affairs Medical Center, San Francisco, California.
5. Department of Medicine, Rush University and Stroger Hospital of Cook County Bureau of Health Services, Chicago, Illinois.
6. Departments of Medicine, Epidemiology and Population Health, Montefiore Medical Center, Bronx, New York.
7. Pediatrics and Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California.
8. Department of Medicine, State University of New York—Downstate Medical Center, Brooklyn, New York.