1 From the Division of Neurology (B.C., J.V., E.W.-S.), National University Hospital (A.T.); and National University of Singapore (N.Y.).
2 From the Division of Neurology (B.C., J.V., E.W.-S.), National University Hospital (A.T.); and National University of Singapore (N.Y.). einar_wilder-smith@nuhs.edu.sg.