1. Department of Otorhinolaryngology, Head & Neck SurgeryLeiden University Medical Center Leiden The Netherlands
2. Department of Otorhinolaryngology, Head & Neck SurgeryErasmus MC Cancer Institute Rotterdam The Netherlands
3. Department of Biomedical Data SciencesLeiden University Medical Center Leiden The Netherlands
4. Department of RadiotherapyLeiden University Medical Center Leiden The Netherlands
5. Department of Head and Neck SurgeryNetherlands Cancer Institute/Antoni van Leeuwenhoek Amsterdam The Netherlands