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Sensitivity analysis. Meta-regression of difference in mean age (A) and creatinine (B). The circles on the graph represent included studies; the size of the circle indicates the weight of each study. To check the robustness of this study, we tentatively excluded one heterogeneous study[19] (C). TDF: Tenofovir; ETV: Entecavir; SD: Standard deviation; CI: Confidence interval.
