1. From the Departments of Neurosurgery (E.L.R., L.R.) and Neurology (E.L.R., K.S., D.G., P.R., M.W.), University Hospital and University of Zurich, Switzerland; Lillometrics (P.D.), Univ. Lille - CHU Lille; Brain Tumor Center at Erasmus MC Cancer Institute (J.L.J., M.J.V.D.B.), Erasmus University Hospital Rotterdam, the Netherlands; and Department of Neuro-Oncology (D.B.), Netherlands Cancer Institute, Amsterdam.