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Inflammatory cytokines measured by ELISA in the uterine tissues of different experimental groups and a normal control. †Indicates significantly higher inflammatory cytokine levels in the uterine tissues of the PID group than other groups (P < 0.001). *Indicates significantly different cytokine levels in the uterine tissues compared with the other groups (P < 0.05). ELISA: enzyme-linked immunosorbent assay.
