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1文献来源Hida T,Nokihara H,Kondo M,et al.Alectinib versus Crizotinib in patients with ALK-positive non-small-cell lung cancer(J-ALEX):An open-label,randomised phase 3 trial[J].Lancet,2017,390(10089):29-39.2证据水平1b。3背景-ALK抑制剂(克唑替尼、艾乐替尼)对ALK阳性的非小细胞肺癌(non-small c