1. Departments of Neurology and Pediatrics and Institute of Human Genetics; University of California, San Francisco; San Francisco; CA
2. Departments of Pediatrics and Neurology; Loma Linda University School of Medicine; Loma Linda; CA
3. Departments of Neurology, Neurosurgery, and Pediatrics; McGill University; Montreal; Quebec; Canada
4. Department of Pediatrics; Dartmouth-Hitchcock Medical Center; Lebanon; NH
5. Departments of Pediatrics and Neurology; George Washington University School of Medicine and Health Sciences; Washington; DC