| Affiliation: | 1. Division of Genetics & Metabolism, Children's National Health System, Washington, District of Columbia;2. The George Washington University School of Medicine and Health Sciences, Washington, District of Columbia;3. Division of Genetics, Boston Children's Hospital, Boston, Massachusetts;4. Harvard Medical School, Boston, Massachusetts;5. Department of Neurology, Boston Children's Hospital, Boston, Massachusetts;6. Howard Hughes Medical Institute, Bethesda, Maryland;7. Division of Clinical Genetics, Morgan Stanley Children's Hospital of New York, New York, New York |
