1. Department of Head and Neck Surgery and OncologyThe Netherlands Cancer Institute Amsterdam The Netherlands
2. Department of Radiation Oncology (MAASTRO)Research Institute GROW, Maastricht University Maastricht The Netherlands
3. Department of Clinical Epidemiology Biostatistics and BioinformaticsAcademic Medical Center Amsterdam The Netherlands
4. Department of RadiotherapyThe Netherlands Cancer Institute Amsterdam The Netherlands
5. Department of Oral and Maxillofacial SurgeryAcademic Medical Center Amsterdam The Netherlands
6. Institute of Phonetic SciencesUniversity of Amsterdam Amsterdam The Netherlands