1. Division of Congenital and Developmental Disorders, National Center on Birth Defects and Developmental Disabilities, CDC
2. University of Utah, Salt Lake City
3. Medical University of South Carolina, Charleston
4. Washington University in St. Louis, Missouri
5. University of North Carolina, Chapel Hill
6. University of Wisconsin–Madison
7. University of Arizona, Tucson
8. Johns Hopkins University
9. University of Colorado at Denver and Health Sciences Center
10. University of Arkansas for Medical Sciences, Little Rock
11. Colorado Department of Public Health and Environment, Denver
12. University of Alabama at Birmingham
13. Rutgers University–New Jersey Medical School, Newark