PD-0445 CIRCULATING TUMOR CELLS IN LOCALLY ADVANCED HEAD AND NECK CANCER: A POSSIBLE TOOL TO PREDICT RESPONSE TO TREATMENT? - Buglione, M.; Salvatore, G.; Almici, C.; Mangoni, M.; Polli, C.; Consoli, F.; Paiar, F.; Pasinetti, N.; Verardi, R.; Magrini, S.M. (Radiotherapy & Oncology, 2012)