9Dirix P, Nuyts S, Poorten VV, et al. The influence of xerostomia af- ter radiotherapy on quality of life - Results of a questionnaire in head and neck cancer[ J]. Support Care Cmleer,2008 ,16 :171 -179.
10Fang FM, Tsai WL, Chen HC, et al. Intensity - modulated or confor- mal radiotherapy improves the quality of life of patients with nasopha- ryngeal carcinoma: comparisons of four radiotherapy techniques [ J ]. Cancer,2007,109 (2) :313 - 321.
