1. Paul and Sheila Wellstone Muscular Dystrophy Center and Department of Neurology University of Minnesota Medical School Minneapolis Minnesota 55455
2. Department of Neurology Boston Children's Hospital Boston Massachusetts
3. Division of Genetics and Genomics Boston Children's Hospital Boston Massachusetts
4. Division of Pediatric Neurology, Department of Pediatrics University of Florida College of Medicine Gainesville Florida 32610
5. University of Minnesota Genomics Center University of Minnesota Minneapolis Minnesota 55455
6. Program in Medical and Population Genetics, Center for Mendelian Genomics Broad Institute of MIT and Harvard Cambridge Massachusetts
7. Analytic and Translational Genetics Unit and Center for Genomic Medicine Massachusetts General Hospital Boston Massachusetts
8. Department of Neurology Brigham and Women's Hospital Boston Massachusetts
9. Division of Genetics, Department of Pediatrics University of Florida College of Medicine Gainesville Florida 32610
10. PerkinElmer Genomics Pittsburgh Pennsylvania
11. Department of Human Genetics Leiden University Medical Center Leiden Netherlands
12. Institute for Translational Neuroscience University of Minnesota Medical School Minneapolis Minnesota 55455