1. Department of Neurology, Mayo Clinic, Rochester, MN, USA
2. Division of Medical Oncology, Mayo Clinic, Rochester, MN, USA
3. Department of Radiology, Mayo Clinic, Rochester, MN, USA
4. The Brain Tumor Center at Erasmus MC Cancer Institute, Rotterdam, the Netherlands
5. Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, the Netherlands