1. Office of Surveillance and Epidemiology; Center for Drug Evaluation and Research, FDA; Silver Spring MD USA
2. Department of Population Medicine; Harvard Medical School and Harvard Pilgrim Health Care Institute; Boston MA USA
3. Translational Research for Affordability and Quality; HealthCore, Inc.; Wilmington DE USA
4. Office of Biostatistics and Epidemiology; Center for Biologics Evaluation and Research, FDA; Silver Spring MD USA