1. Division of Genetics and Genomic Medicine, Department of Pediatrics; University of California, Irvine; Orange California
2. Neuromuscular Program, Department of Neurology; University of California, Irvine; Orange California
3. Department of Neurology; Technische Universität Dresden, and German Center for Neurodegenerative Diseases (DZNE), Research Side Dresden; 01307 Dresden Germany
4. Deschutes Osteoporosis Center; Bend Oregon
5. Department of Neurology; University of Kentucky Medical School; Lexington Kentucky