1. From the Departments of Radiology (I.R.v.d.W., G.H., M.A.A.v.W.), Neurology (M.J.H.W.), and Clinical Epidemiology (A.A.), Leiden University Medical Center, Leiden, The Netherlands; Department of Neurology, Medical Center Haaglanden, The Hague, The Netherlands (I.R.v.d.W., J.B.); Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus (A.A.) and Department of Radiology (B.K.V.), University Medical Center Utrecht, Utrecht, The Netherlands; Department of Radiology, Radboud University...