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. 2018 Feb 23;11:955–965. doi: 10.2147/OTT.S153290

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© 2018 Sacdalan et al. This work is published and licensed by Dove Medical Press Limited

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Flowchart of search strategy for meta-analysis on prognostic utility of the NLR in patients receiving immune checkpoint inhibitors.

Abbreviations: NLR, neutrophil-to-lymphocyte ratio; OS, overall survival; PFS, progression-free survival.