1. Neuromuscular and Neurogenetic Disorders of Childhood Section; National Institutes of Health; Bethesda MD
2. National Heart and Lung Institute; Imperial College London; London United Kingdom
3. Department of Physiology; VU University Medical Center; Amsterdam the Netherlands
4. Department of Neuropediatrics and Muscle Disorders; University Medical Center Freiburg; Freiburg Germany
5. Section of Child Neurology, Department of Pediatrics and Neurology; University of Colorado School of Medicine; Aurora CO
6. University of Colorado Denver School of Medicine; Aurora CO
7. Children's National Health System; Washington DC
8. Cure CMD; Kaiser Southern California Permanente Medical Group; Olathe KS
9. Department of General Pediatrics, Adolescent Medicine, and Neonatology; University Medical Center Freiburg; Freiburg Germany
10. Department of Pathology; Children's Hospital Colorado; Aurora CO
11. Neuromuscular Diseases Laboratory, Centre for Medical Research, Faculty of Medicine, Dentistry, and Health Sciences; University of Western Australia; Crawley Western Australia Australia; and Harry Perkins Institute of Medical Research, Queen Elizabeth II Medical Centre, Perth, Western Australia, Australia
12. Institute for Neuroscience and Muscle Research, Children's Hospital at Westmead; University of Sydney; Sydney New South Wales Australia