1. Department of Oral and Maxillofacial Surgery; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
2. Department of Pathology; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
3. Department of Otorhinolaryngology/Head and Neck Surgery; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
4. Department of Radiotherapy; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
5. Department of Rehabilitation; University of Groningen; University Medical Center Groningen; Groningen The Netherlands