1 From Donders Institute for Brain, Cognition and Behaviour (B.C.S.), Department of Neurology, Radboud University Nijmegen Medical Centre; and the Department of Neurology and the Department of Neurosurgery (G.D.), University Medical Center Groningen, University of Groningen, the Netherlands.
2 From Donders Institute for Brain, Cognition and Behaviour (B.C.S.), Department of Neurology, Radboud University Nijmegen Medical Centre; and the Department of Neurology and the Department of Neurosurgery (G.D.), University Medical Center Groningen, University of Groningen, the Netherlands. G.Drost@umcg.nl.