1. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital Pellegrin; Bordeaux France
2. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital Lariboisière; Paris France
3. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital of Nancy; France
4. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital; Marseille France
5. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital Creteil; France
6. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital Charles Nicolle; Lille France
7. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital Grenoble; France
8. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital Charles Nicolle; Rouen France
9. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital Guy de Chauliac; Montpellier France
10. Otorhinolaryngology, Head and Neck Surgery Department; University Hospital Rangueil-Larrey; Toulouse France
11. Biostatistics Department; University Hospital Pellegrin; Bordeaux France