Functional Analysis and Description of Dose Response Relationship of the Salivary Glands After Radiotherapy of Head and Neck Tumors Measured by Quantitative Pertechnetate Scintigraphy: Comparison of Intensity Modulated Radiotherapy (IMRT) and Conventional Radiotherapy with and Without Amifostine - Munter, M.W.; Karger, C.; Hoffner, S.; Rudat, V.; Debus, J. (International Journal of Radiation Oncology, Biology, Physics, 2005)