1. NHGRI; Office of the Clinical Director; NIH; Bethesda Maryland
2. Department of Neurology; Johns Hopkins University; Baltimore Maryland
3. McKusick-Nathans Institute of Genetic Medicine; Johns Hopkins University; Baltimore Maryland
4. Greenberg Center for Skeletal Dysplasia; Johns Hopkins University; Baltimore Maryland
5. Department of Neurology; University of Minnesota; Minneapolis Minnesota
6. The Hospital for Sick Children; Clinical and Metabolic Genetics; University of Toronto; Toronto Ontario Canada
7. Section of Pediatric Neuroradiology; Division of Pediatric Radiology; Johns Hopkins University; Baltimore Maryland
8. Division of Neurogenetics; Kennedy Krieger Institute; Baltimore Maryland