Affiliation: | 1. Division of Medical Genetics, A. I. duPont Hospital for Children, , Wilmington, Delaware;2. Division of Genetics and Metabolism, Children's National Medical Center, , Washington, District of Columbia;3. Division of Clinical Genetics, Levine Children's Hospital, , Charlotte, North Carolina;4. Section of Clinical Genetics, St. Christopher's Hospital for Children, , Philadelphia, Pennsylvania;5. Center for Integrative Brain Research, Seattle Children's Research Institute, , Seattle, Washington;6. Division of Genetics, The Children's Hospital of Philadelphia, , Philadelphia, Pennsylvania;7. Department of Biomedical Research, Nemours' Children's Clinic, , Wilmington, Delaware |