1. Department of Otorhinolaryngology Radboud Institute for Health Sciences, Radboud University Medical Center Nijmegen The Netherlands
2. Dutch Academic Alliance Skull Base Pathology Radboud University Medical Center, Maastricht University Medical Center+ Nijmegen/Maastricht The Netherlands
3. Department of Neurosurgery Gamma Knife Center, ETZ Hospital Tilburg The Netherlands
4. Department of Health Evidence Radboud Institute for Health Sciences, Radboud University Medical Center Nijmegen The Netherlands
5. Department of Otorhinolaryngology Maastricht University Medical Center Maastricht The Netherlands