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Correlation analysis between inflammatory factors IL-8, TNF-α and PAPP-A. (A) PAPP-A was negatively correlated with marker IL-8 (r=-0.691; P<0.001). (B) PAPP-A was negatively correlated with marker TNF-α (r=-0.692; P<0.001). IL-8, interleukin-8; TNF-α, tumor necrosis factor-α; PAPP-A, pregnancy-associated plasma protein-A.
