1. Department of Otolaryngology/Head and Neck Surgery Amsterdam UMCVrije Universiteit Amsterdam Amsterdam The Netherlands
2. Department of Otorhinolaryngology University of Bari Bari Italy
3. Department of Pathology and Department of Oral and Maxillofacial Surgery/Pathology Amsterdam UMC and Academic Centre for Dentistry Amsterdam (ACTA) Cancer Center AmsterdamVrije Universiteit Amsterdam Amsterdam The Netherlands
4. Department of Radiation Oncology Amsterdam UMCVrije Universiteit Amsterdam Amsterdam The Netherlands
5. Department of Epidemiology and Biostatistics Amsterdam UMCVrije Universiteit Amsterdam Amsterdam The Netherlands