1. ; Department of Pediatrics, Division of Medical Genetics; Stanford University; Stanford California
2. ; Department of Neuroradiology; University of California San Francisco; San Francisco California USA
3. ; Academic Medical Center; University of Amsterdam, Laboratory of Genetic Metabolic Diseases; Amsterdam The Netherlands
4. ; Department of Neurology; Stanford University; Stanford California
5. Genetics Department; Kaiser Permanente of Northern California; San Jose California USA
6. ; Laboratory of Biochemical Genetics; University of Maastricht; Maastricht The Netherlands