1. Center for Communicable Disease Dynamics, Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
2. Yale School of Medicine, New Haven, Connecticut
3. Division of International Epidemiology and Population Studies, Fogarty International Center, National Institutes of Health, Bethesda
4. Agency for HealthCare Research and Quality, Department of Health and Human Services, Rockville, Maryland
5. Institute for Health Research, Kaiser Permanente Colorado, Denver
6. Department of Ecology and Evolutionary Biology, Princeton University, New Jersey
7. Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, Massachusetts