1. Vanderbilt University Medical Center Nashville Tennessee
2. University of California San Diego California
3. University of Colorado School of Medicine Aurora Colorado
4. Children's Hospital of Philadelphia, University of Pennsylvania Philadelphia Pennsylvania
5. Greenwood Genetic Center Greenwood South Carolina
6. Boston Children's Hospital Boston Massachusetts
7. Cincinnati Children's Hospital Cincinnati Ohio
8. Gilette Children's Specialty Healthcare St. Paul Minnesota
9. Rush University Medical Center Chicago Illinois
10. Washington University School of Medicine St. Louis Missouri
11. University of California, San Francisco Benioff Children's Hospital Oakland Oakland California
12. Baylor College of Medicine Houston Texas
13. University of Alabama at Birmingham Birmingham Alabama