1. Department of Otorhinolaryngology-Head & Neck Surgery; Inselspital, Bern University Hospital and University of Bern; Bern Switzerland
2. Department of Radiation Oncology; Inselspital, Bern University Hospital and University of Bern; Bern Switzerland
3. Department of Clinical Research; University of Bern; Bern Switzerland
4. Institute of Pathology; University of Bern; Bern Switzerland