1. Department of Biostatistics, Yale School of Public Health, New Haven, CT
2. Marshfield Clinic Research Institute, Center for Clinical Epidemiology & Population Health, Marshfield, WI
3. Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT
4. Yale Institute of Global Health, New Haven, CT
5. Yale School of Medicine, New Haven, CT.