1. Departments of Pathology, Neurology, Pediatrics, Psychiatry & Behavioral Sciences, and Orthopaedic Surgery University of Oklahoma Health Sciences Center and Veterans Affairs Medical Center, Oklahoma City, OK
2. Department of Neurology University of Texas Southwestern Medical Center-Dallas
3. Departments of Neurology and Pediatrics University of Texas Southwestern Medical Center-Dallas, and Division of Pediatric Neurology, Children's Medical Center of Dallas, TX