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Evolution of the levels of each cytokine throughout pregnancy in the three study groups. Cytokine concentrations were expressed as standardized values (mean = 0, SD = 1). RANTES, regulated upon activation normal T-cell expressed and secreted; TNFα, tumor necrosis factor-alpha; TGFβ, transforming growth factor-beta; IL8, interleukin 8; and SDF1α, stromal cell-derived factor 1 alpha.
