1. Department of Neurology, University of Washington, Seattle, WA, USA
2. Department of Radiology, Seattle Children’s Hospital, Seattle, WA, USA
3. Department of Radiology, University of Washington, Seattle, WA, USA
4. Human Biology Division, Fred Hutchinson Research Center, Seattle, WA, USA
5. Center for Clinical and Translational Research, Seattle Children’s Hospital, Seattle, WA, USA
6. Neuromuscular Unit, Department of Neurology, University of Rochester Medical Center, Rochester, NY, USA
7. Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands