EP-1158: Prognostic factors and role of neck dissection in N3 head and neck cancers treated with radiotherapy. (April 2018) - Boros, A.; Blanchard, P.; Gorphe, P.; Breuskin, I.; Even, C.; Nguyen, F.; Deutsch, E.; Bidault, F.; Janot, F.; Temam, S.; Mirghani, H.; Tao, Y.