1. Department of Otolaryngology Head and Neck Surgery, University Hospital Center CHU Gabriel Montpied, University d’Auvergne Clermont 1, Clermont-Ferrand, France;
2. Radiotherapy Department, Centre Jean Perrin, Clermont-Ferrand, France;
3. Medical Oncology Department, Centre Jean Perrin, Clermont-Ferrand, France;
4. Clinical Research Department, CHU Clermont-Ferrand, Clermont-Ferrand, France