1. Doctor of Physical Therapy Division, Department of Orthopedics, School of Medicine, Duke University, Durham, North Carolina;
2. Department of Rehabilitation Medicine, Seattle Children’s Hospital, Seattle, Washington;
3. Newcastle University, Newcastle upon Tyne, United Kingdom;
4. Western Maryland Hospital System, Hagerstown, Maryland;
5. Duke University Health System and Lenox Baker Children’s Hospital, Durham, North Carolina;
6. Children’s Hospital Colorado, Aurora, Colorado; and
7. Duke University Health System, Durham, North Carolina;
8. Muscular Dystrophy Association of Queensland, Nundah, Australia