1. Department of Health Policy and Management, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.
2. Health Policy Department, Harvard University, Cambridge, Massachusetts, USA.
3. National Public Health Information Coalition, Marietta, Georgia, USA.
4. Division of Birth Defects and Infant Disorders, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
5. SSRS, Glen Mills, Pennsylvania, USA.