1. Washington University School of Medicine St Louis MO USA
2. Shriners Hospitals for Children, Cerebral Palsy Network University of Hartford West Hartford CT USA
3. Department of Physical Medicine and Rehabilitation Michigan Medicine/University of Michigan Ann Arbor MI USA
4. Department of Neurology, Perelman School of Medicine University of Pennsylvania Philadelphia PA USA
5. Gillette Children's Specialty Healthcare, Department of Rehabilitation Medicine University of Minnesota Minneapolis MN USA
6. Cerebral Palsy & Pediatric Movement Disorders Program Barrow Neurological Institute, Phoenix Children's Hospital Phoenix AZ USA
7. Departments of Child Health, Neurology, and Cellular & Molecular Medicine and Program in Genetics University of Arizona College of Medicine–Phoenix Children's Hospital Tucson AZ USA
8. University of Chicago Kennedy Research Center on Neurodevelopmental Disabilities Chicago IL USA
9. Department of Pediatrics Nationwide Children's Hospital and the Ohio State University Columbus OH USA
10. Department of Pediatrics, Division of Child Neurology, UPMC Children's Hospital of Pittsburgh University of Pittsburgh Pittsburgh PA USA
11. Department of Neurology, Division of Pediatric Neurology Washington University School of Medicine St Louis MO USA