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Forest plot of comparison of RCTs: CRR in cervical HPV infection patients receiving PDT vs. patients receiving placebo. Data processing was performed using RevMan V5.3. The data were analyzed by Mantel–Haenszel method and random effect model and presented as odds ratio (OR) with 95% confidence interval (CI). I2 = 0 indicates the absence of heterogeneity, P < .05 indicates statistical significance.
