1. Department of Otorhinolaryngology-Head and Neck Surgery; University Hospital Rangueil-Larrey; Toulouse France
2. Department of Otorhinolaryngology-Head and Neck Surgery; University Hospital Lariboisière; Paris France
3. Biostatistics Department; L'Institut Universitaire du Cancer de Toulouse-Oncopole (IUCT-Oncopole); Cancer Institute; Toulouse France
4. Department of Otorhinolaryngology-Head and Neck Surgery; University Hospital Pellegrin; Bordeaux France
5. Department of Otorhinolaryngology-Head and Neck Surgery; University Hospital of Nancy; Nancy France
6. Department of Otorhinolaryngology-Head and Neck Surgery; University Hospital Nantes; Nantes France
7. Department of Otorhinolaryngology-Head and Neck Surgery; University Hospital Saint-Etienne; Saint-Priest-en-Jarez France
8. Department of Otorhinolaryngology-Head and Neck Surgery; University Hospital Poitiers; Poitiers France
9. Department of Otorhinolaryngology-Head and Neck Surgery; University Hospital Grenoble; Grenoble France
10. Department of Pathology, IUCT-Oncopôle; Cancer Institute; Toulouse France
11. Radiation Oncology Department, IUCT-Oncopôle; Cancer Institute; Toulouse France
12. Department of Otorhinolaryngology-Head and Neck Surgery; Hopital Foch; Suresnes France
13. Department of Otorhinolaryngology-Head and Neck Surgery; Tenon Hospital, Paris-Est University; Paris France
14. Department of Otorhinolaryngology-Head and Neck Surgery; Institut Gustave Roussy; Villejuif France