1. Department of Radiation-Oncology, Proton Therapy Center of Orsay (CPO), Institut Curie, Orsay, France
2. Department of Radiation-Oncology, Institut Curie, Paris, France
3. Department of Radiotherapy, Pitie-Salpetriere University Hospital (APHP), Paris, France
4. Department of Head and Neck Surgery, Lariboisiere Hospital, Paris, France
5. Department of Radiation-Oncology, Gustave-Roussy Cancer Campus, Villejuif, France
6. Department of Otolaryngology, Saint-Joseph Hospital, Paris, France
7. Department of Otolaryngology, Institut Curie, Paris, France