1. Department of Laboratory Medicine and Pathology Mayo Clinic Rochester Minnesota USA
2. Parent Project Muscular Dystrophy Washington District of Columbia USA
3. Department of Neurology The Children's Hospital of Philadelphia Philadelphia Pennsylvania USA
4. Center for Genetic Medicine, Feinberg School of Medicine Northwestern University Chicago Illinois USA
5. Department of Pediatrics University of Colorado School of Medicine, Children's Hospital Colorado Aurora Colorado USA
6. Division of Human Genetics Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
7. Division of Human Genetics, Department of Pediatrics The Children's Hospital of Philadelphia Philadelphia Pennsylvania USA
8. Ambry Genetics Aliso Viejo California USA