1. CH Belfort-Montbéliard, Department of Radiation Therapy, Boulevard du Maréchal Juin, 25209 Montbéliard, France
2. GORTEC, Hôpital Bretonneau, 2 Boulevard Tonnellé, 37044 Tours, France
3. CHU – Normandie Université, Department of Head & Neck Surgery, 14000 Caen, France
4. Center François Baclesse – Normandie Université, Department of Head & Neck Surgery, 3 Avenue Général Harris, 14000 Caen, France
5. Center François Baclesse – Normandie Université, Department of Radiation Therapy, 3 Avenue Général Harris, 14000 Caen, France
6. CHUV. Lausanne, Department of Radio-oncology, Rue du Bugnon 46, CH-1011 Lausanne, Switzerland