1. Center of Neurosurgery, Department of General Neurosurgery, University of Cologne, Cologne, Germany
2. Department of Neurology, University Hospital and University of Zurich, Zurich, Switzerland
3. Department of Functional and Stereotactic Neurosurgery and Radiosurgery, Timone University Hospital, Marseille, France
4. Department of Neurosurgery, Bergen University Hospital and Department of Clinical Medicine, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
5. Department of Neuropathology, University Hospital Heidelberg, Heidelberg, Germany
6. Manchester Centre for Genomic Medicine and NW Laboratory Genetics Hub, Manchester University Hospitals NHS Foundation Trust, Manchester, UK
7. Department of Neurosurgery, Erasmus Hospital, Free University of Brussels, Brussels, Belgium
8. Department of Neurosurgery, University Hospital San Carlos, Complutense University of Madrid, Madrid, Spain; University Hospital San Carlos, CyberKnife Centre, Genesiscare Madrid, Madrid, Spain
9. Department of Neuroradiology, IRCCS San Raffaele Scientific Institute and Vita-Salute San Raffaele University, Milan, Italy
10. Cambridge Skull Base Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
11. Department of Otolaryngology, Unit of Otology, Auditory implants and Skull Base Surgery, Public Assistance–Paris Hospital, Pitié-Salpêtrière Group Hospital, Paris, France
12. Unit of Radiotherapy, Neurological Institute Carlo Best, Milan, Italy
13. Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, Heidelberg, Germany
14. Department of Neurosurgery Ludwig-Maximilians University and DKTK partner site, University of Munich, Munich, Germany