1. Department of Neurology, Division of Neuromuscular Medicine; Ohio State University, Wexner Medical Center; 395 West 12th Avenue Columbus Ohio 43210 USA
2. Department of Pediatrics; Ohio State University; Columbus Ohio USA
3. CBS Squared, Inc.; Fort Washington; Pennsylvania USA
4. Department of Neurology; University of Utah School of Medicine; Salt Lake City Utah USA
5. Department of Pediatrics; University of Utah School of Medicine; Salt Lake City Utah USA
6. Department of Neurology; Johns Hopkins University School of Medicine; Baltimore Maryland USA
7. Department of Pediatrics; Johns Hopkins University School of Medicine; Baltimore Maryland USA
8. Department of Biochemistry and Medical Genetics; University of Manitoba; Winnipeg Manitoba Canada
9. Department of Physical Therapy and Human Movement Sciences; Feinberg School of Medicine; Northwestern University; Chicago Illinois USA
10. Department of Neurology; University of Connecticut School of Medicine; Hartford Connecticut USA
11. Department of Pediatrics; University of Connecticut School of Medicine; Hartford Connecticut USA
12. Department of Pediatrics; University of Wisconsin School of Medicine; Madison Wisconsin USA
13. Division of Pediatric Neurology; Hôpital Sainte-Justine Montréal; Montréal Québec Canada
14. Department of Biomedical Informatics; University of Utah School of Medicine; Salt Lake City Utah USA
15. Department of Molecular Pathology; Ohio State University, Wexner Medical Center; Columbus Ohio USA
16. Intermountain Healthcare at Primary Children's Medical Center; Salt Lake City Utah USA
17. Pediatric Occupational Therapy Services; Chicago Illinois USA