1. Cleveland Clinic, Cleveland, Ohio
2. RTI International, Research Triangle Park, North Carolina
3. Duke University, Durham, North Carolina
4. University of Alabama at Birmingham, Birmingham, Alabama
5. University of Pittsburgh, Magee-Womens Research Institute, Pittsburgh, Pennsylvania
6. University of New Mexico, Albuquerque, New Mexico
7. University of California San Diego, San Diego, California
8. Brown University, Providence, Rhode Island
9. University of Pennsylvania, Philadelphia, Pennsylvania
10. Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland