1 Department of Medicine (Neurology) (P.R.B., J.W-C., D.A.L.), University of Ottawa; Ottawa Hospital Research Institute (P.R.B., J.W-C.); Department of Medicine (Dermatology) (L.L., C.K.), University of Ottawa; Department of Anatomical Pathology (S.H.B.), University of Ottawa; and Department of Genetics (J.W-C., T.H., K.M.B.), Children's Hospital of Eastern Ontario, Ottawa, Canada.