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. 2017 Feb 17;7:42913. doi: 10.1038/srep42913

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(A) Forrest plot to assess the overall effect of CTLA-4 on OS in all cancer patients. (B) Forrest plot to assess the effect of CTLA-4 on OS in subgroups divided by cancer types. (C) Forrest plot to assess the effect of CTLA-4 on OS in subgroups divided by experimental methods. (D) Forrest plot to assess the effect of CTLA-4 on OS in subgroups divided by CTLA-4 sources.