University of Texas Medical Branch-Galveston - Department of Neurology, University of Texas Medical Branch-Galveston - Department of Neurology, University of Texas Medical Branch-Galveston - Department of Neurology, Houston Methodist Research Institute - Department of Neurology, University of California, Irvine - Department of Psychiatry and Human Behavior and the Sue and Bill Gross Stem Cell Center, University of Texas Medical Branch-Galveston - Department of Internal Medicine, University of California, Irvine - Department of Psychiatry and Human Behavior and the Sue and Bill Gross Stem Cell Center, Duke University School of Medicine - Department of Neurology, University of Texas Medical Branch-Galveston - Department of Neuroscience, Cell Biology, and Anatomy, University of Texas Medical Branch-Galveston - Department of Neurology, University of Texas Medical Branch-Galveston - Department of Neurology, Sam Houston State University - Department of Biochemistry, Cell Biology, Genetics, University of Washington - Department of Laboratory Medicine and Pathology, Buck Institute for Research on Aging, Houston Methodist Research Institute - Department of Neurology, University of Texas Medical Branch-Galveston - Department of Internal Medicine, University of California, Irvine - Departments of Pathology & Laboratory Medicine, Neurology, and Biological Chemistry, and the UCI Institute for Neurotherapeutics, University of Texas Medical Branch-Galveston - Department of Neurology, University of California, Irvine - Department of Psychiatry and Human Behavior and the Sue and Bill Gross Stem Cell Center and University of Texas Medical Branch-Galveston - Department of Neurology