1. Department of Head and Neck Surgery, Hospices Civils de Lyon; University Hospital Lyon-Nord; Lyon France
2. Department of Head and Neck Surgery, Assistance Publique Hôpitaux de Paris; Hôpital Européen Georges Pompidou; Paris France
3. Department of Head and Neck Surgery; University Hospital Bretonneau; Tours France
4. Department of Head and Neck Surgery; University Hospital Carémeau; Nîmes France
5. Department of Head and Neck Surgery; University Hospital Rangueil-Larrey; Toulouse France
6. Department of Head and Neck Surgery; University Hospital Dupuytren; Limoges France
7. Department of Head and Neck Surgery; University Hospital Pellegrin; Bordeaux France
8. Department of Head and Neck Surgery; University Hospital Hôtel-Dieu; Nantes France
9. Department of Head and Neck Surgery; University hospital Pontchaillou; Rennes France
10. Clinical Research Committee, Hospices Civils de Lyon; University Hospital Lyon-Nord; France
11. Université Claude Bernard; Lyon France