Changes in salivary gland function after radiotherapy of head and neck tumors measured by quantitative pertechnetate scintigraphy: comparison of intensity-modulated radiotherapy and conventional radiation therapy with and without Amifostine - Münter, M W; Hoffner, S; Hof, H; Herfarth, K K; Haberkorn, U; Rudat, V; Huber, P; Debus, J; Karger, C P (Int J Radiat Oncol Biol Phys, 2007)