Efficacy and safety of icotinib combined with radiotherapy in the treatment of lung cancer with brain metastasis: a  metaanalysis
Chen Benchao, Li Heng, Xiang Xudong, Li Gaofeng, Fu Feng, Guo Qi，Fan Shengliang，Wang Deguang
Clinical Focus . 2018, (8): 705 -710 .  DOI: 10.3969/j.issn.1004-583X.2018.08.014