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