1. Parent Project Muscular Dystrophy, Washington, DC, USA
2. Children’s Hospital Colorado/University of Colorado, Aurora, CO, USA
3. Department of Neurology, Virginia Commonwealth University, Richmond, VA, USA
4. University of Virginia Children’s Hospital, Charlottesville, VA, USA
5. University of Rochester, , Rochester, NY, USA
6. Nationwide Children’s Hospital, Columbus, OH, USA
7. EveryLife Foundation for Rare Diseases, Washington, DC, USA
8. Ann & Robert H Lurie Children’s Hospital of Chicago, Chicago, IL, USA
9. Stead Family Department of Pediatrics, University of Iowa, , Iowa City, IA, USA
10. Cincinnati Children’s Hospital, Cincinnati, OH, USA
11. Harvard Medical School and Brigham and Women’s Hospital, Boston, MA, USA
12. Nemours Children’s Hospital-Delaware, Wilmington, DE, USA