1. Department of Gynaecology and Obstetrics, Leiden University Medical Centre, 2333 ZA Leiden, The Netherlands
2. Department of Medical Oncology, Leiden University Medical Centre, 2333 ZA Leiden, The Netherlands
3. Department of Research and Development, Netherlands Comprehensive Cancer Organisation (IKNL), 3511 DT Utrecht, The Netherlands
4. Department of Pathology, Leiden University Medical Centre, 2333 ZA Leiden, The Netherlands
5. Department of Head and Neck Surgery and Oncology, The Netherlands Cancer Institute, 1066 CX Amsterdam, The Netherlands
6. Department of Otorhinolaryngology, Leiden University Medical Centre, 2333 ZA Leiden, The Netherlands
7. Department of Medical Oncology, The Netherlands Cancer Institute, 1066 CX Amsterdam, The Netherlands