1. Otolaryngology–Head and Neck Surgery Department, Clermont-Ferrand University Hospital, Clermont-Ferrand, France
2. Biostatistics Unit (DRCI), Clermont-Ferrand University Hospital, Clermont-Ferrand, France
3. Radiation Oncology Department, Centre Jean Perrin, Clermont-Ferrand, France
4. Medical Oncology Department, Centre Jean Perrin, Clermont-Ferrand, France