Helical tomotherapy for the reirradiation of locoregional recurrent nasopharyngeal carcinoma - Garcia Ramirez, J; Puebla, F; Lopez Guerra, J L; Matute, R; Marrone, I; Miguez, C; Sevillano, D; Sanchez-Reyes, A; Praena-Fernandez, J M; Azinovic, I (RADIOTHERAPY AND ONCOLOGY, 2014)