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Correlation between mRNA expression of selected transporters and IL-8, and the degree of chorioamnionitis in each placental sample. The degree of inflammation is presented from 0 to 3, with stages 1, 2 and 3 classified as previously described [23]. All preterm delivery placentas without chorioamnionitis (PTD) samples are considered as stage 0. Statistical analysis: non-parametric Spearman correlation (n=6/group).
