1. Down Syndrome Program, Division of Genetics, Department of Pediatrics; Massachusetts General Hospital; Boston Massachusetts
2. Department of Pediatrics, Clinical Genetics; Levine Children's Hospital at Carolina Healthcare System; Charlotte North Carolina
3. Harvard Medical School; Boston Massachusetts
4. Center for Patient Safety and Quality Research, Program for Patient Safety and Quality; Boston Children's Hospital; Boston Massachusetts
5. Down Syndrome Program, Division of Developmental Medicine, Department of Medicine; Boston Children's Hospital; Boston Massachusetts
6. Down Syndrome Center of Western Pennsylvania; Children's Hospital of Pittsburgh of University of Pittsburgh Medical Center; Pittsburgh Pennsylvania
7. Comprehensive Down Syndrome Program, Division of Medical Genetics; Duke University Medical Center; Durham North Carolina