1. Medical Genetics; MassGeneral Hospital for Children; Boston Massachusetts
2. Massachusetts Center for Birth Defects Research and Prevention; Boston Massachusetts
3. Division of Medical Genetics; Department of Pediatrics University of Utah; Salt Lake City Utah
4. National Center on Birth Defects and Developmental Disabilities; Centers for Disease Control and Prevention; Atlanta Georgia
5. McKing Consulting Corporation; Fairfax Virginia
6. Baylor College Medicine; Houston Texas
7. Department of Cardiology; Boston Children's Hospital; Boston Massachusetts