1. Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
2. Public Health Modeling Unit, Yale School of Public Health, New Haven, Connecticut, USA
3. Department of Health Policy and Management, Yale School of Public Health, New Haven, Connecticut, USA
4. Bureau of Infectious Disease and Laboratory Sciences, Massachusetts Department of Public Health, Boston, Massachusetts, USA
5. Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
6. Department of Biostatistics, Yale School of Public Health, Connecticut, USA