1. Department of Radiology (L.J.G., J.J.M.Z., P.R.L.), University Medical Center Utrecht, the Netherlands.
2. From the Department of Neurology, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, the Netherlands (C.J.M.K.)
3. Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus (C.J.M.K., G.J.B.), University Medical Center Utrecht, the Netherlands.