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. 2019 Jul 2;12:5201–5213. doi: 10.2147/OTT.S204403

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© 2019 Wu et al.

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Funnel plots assessing the potential publication bias of the included studies. (A) Funnel plot of publication bias for overall survival. (B) Funnel plot adjusted by trim-and-fill analysis for overall survival. (C) Funnel plot of publication bias for cancer-specific survival. (D) Funnel plot adjusted by trim and fill analysis for recurrence-free survival.