1. From the Department of Neurosciences, Medical University of South Carolina, Charleston, SC (J.D.B., T.N.T.); Department of Neurology, Tufts University, Boston, MA (E.F.); Sunnybrook Health Sciences Centre, Department of Medicine (Neurology), University of Toronto, Toronto, Ontario, Canada (R.H.S.); and Department of Radiology, Medical University of South Carolina, Charleston, SC (Z.R., T.B.).