1. Department of NeurologyUniversity of Utah School of Medicine Salt Lake City Utah
2. Regional Pediatric Rehabilitation CenterQueen Silvia Children's Hospital Gothenburg Sweden
3. Department of Pediatrics, Epidemiology and Clinical NeurologyUniversity of Western Ontario, London Health Science Centre London Ontario Canada
4. College of Dental Medicine, Roseman University of Health Sciences Henderson Nevada
5. Department of Public HealthUniversity of Utah Salt Lake City Utah
6. Department of NeurologyVirginia Commonwealth University Richmond Virginia
7. Department of NeurologyUniversity of Rochester Rochester New York