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<正>1文献来源Rizvi NA,Mazieres J,Planchard D,et al.Activity and safety of Nivolumab,an anti-PD-1immune checkpoint inhibitor,for patients with advanced,refractory squamous non-small-cell lung cancer(Check Mate 063):A phase 2,single-arm trial[J].Lancet Oncol,2015,16(3):257-265.2证据水平2b。