1. Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY, USA
2. Department of Medicine, University of California San Francisco, San Francisco, CA, USA
3. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
4. Johns Hopkins University School of Medicine, Baltimore, MD, USA
5. Division of General Internal Medicine, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
6. Department of Health, Behavior, and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA