Long-term outcomes of induction chemotherapy followed by chemoradiotherapy vs chemoradiotherapy alone as treatment of unresectable head and neck cancer: follow-up of the Spanish Head and Neck Cancer Group (TTCC) 2503 Trial

Ricardo Hitt, L. Iglesias, Antonio López–Pousa, Alfonso Berrocal-Jaime, Juan J. Grau, Carlos García Girón, Javier Martínez‐Trufero, Marta Guix, Julio José Lambea‐Sorrosal, E. del Barco, Xavier Leon-Vintró, A.J. Cunquero Tomás, Neus Basté, Alberto Ocaña, Juan Jesús Cruz, the Spanish Head and Neck Cancer Cooperative Group (TTCC)