1. Division of Neurology, Children's Hospital Medical Center, Cincinnati, Ohio,
2. Division of Neurology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
3. St. Louis Children's Hospital and Departments of Neurology and Pediatrics, St. Louis, Missouri
4. Fundacion Pro Neurociencias, Rio Cuarto, Argentina
5. Johnson & Johnson Pharmaceutical Research & Development, LLC, Raritan, New Jersey