Head and neck cancer of unknown primary: recurrence pattern based on treatment volumes

Guaineri, A; Maddalo, M; Bastia, Mbde; Magrini, Sm; Toraci, C; Bossi, P; Paderno, A; Maroldi, R; Ravanelli, M; Piazza, C; La Mattina, S; Facheris, G; Volpi, G; Singh, N; Pastorello, E