1. Department of PediatricsVanderbilt University Medical Center Nashville Tennessee
2. Department of PediatricsBaylor College of Medicine Houston Texas
3. Division of Neurology and PediatricsChildren's Hospital of Philadelphia Philadelphia Pennsylvania
4. Department of PediatricsUniversity of Colorado School of Medicine Aurora Colorado
5. Greenwood Genetic Center Greenwood South Carolina
6. Department of PediatricsBoston Children's Hospital Boston Massachusetts
7. Department of PediatricsCincinnati Children's Hospital Cincinnati Ohio
8. Department of Pediatrics, UCSF Benioff Children's Hospital Oakland California
9. Department of PediatricsGilette Children's Specialty Healthcare Saint Paul Minnesota
10. Department of PediatricsRush University Medical Center Chicago Illinois
11. Department of Neurology, Washington University School of Medicine St. Louis Missouri
12. Dept. Human Genetics, Emory University School of Medicine
13. Department of Pediatrics, University of Alabama at Birmingham Birmingham Alabama