1 From the Department of Neurology (D.W.J.D.), Erasmus University Medical Center Rotterdam, the Netherlands; and Department of Neurology (S.J.W.), Dell Medical School, The University of Texas at Austin. d.dippel@erasmusmc.nl.
2 From the Department of Neurology (D.W.J.D.), Erasmus University Medical Center Rotterdam, the Netherlands; and Department of Neurology (S.J.W.), Dell Medical School, The University of Texas at Austin.