1. Division of Neurology Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
2. Department of Pediatrics University of Cincinnati College of Medicine Cincinnati Ohio USA
3. Department of Pediatrics Children's Hospital of Philadelphia and University of Pennsylvania Philadelphia Pennsylvania USA
4. UCB Pharma Slough UK
5. Departments of Neurology and Pediatrics Children's Hospital of Philadelphia and University of Pennsylvania Philadelphia Pennsylvania USA
6. Division of Pediatric Neurology, Department of Neurology University of Washington Seattle Washington USA
7. UCB Pharma, Monheim am Rhein Germany
8. Department of Neurology Washington University School of Medicine and St. Louis Children's Hospital St. Louis Missouri USA
9. Department of Neurology, Nemours Children's Health Wilmington Delaware USA
10. Department of Pediatrics Children's Hospital Colorado Aurora Colorado USA
11. UCB Pharma Copenhagen Denmark
12. UCB Pharma Raleigh North Carolina USA
13. Applied Clinical Research Center, Children's Hospital of Philadelphia Philadelphia Pennsylvania USA