1. From the Department of Neurosurgery (R.R., C.S., I.C.), Department of Stereotactic and Functional Neurosurgery (V.A.C., P.C.R.), Department of Neurology (W.-D.N.), Department of Neuroradiology (K.E., H.U.), and Department of Nursing-IT (R.K.), Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany; and Department of Neurosurgery, University Hospital Essen, Germany (R.J.).