7Sasaki R,Soejima T, Matsumoto A, et al. Clinical signify-cance of serum pulmonary surfactant protein A and D for the early detection of radiation pneumonitis[J], Int J Radiat Oncol Bibl Phy,2001,50 (2) :301 - 307
8Chen Y,Rubin P,Williams J,et al. Circulating IL- 6 as fl predictor of radiation pneumonitis[J ]. Int JRadiat O ncol Biolphys,2001, 49(3) :641 - 648
