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Correlation between percentage of Th1 cells and interferon (IFN)-γ concentrations in culture supernatant, percentage of Th2 cells and interleukin (IL)-4 concentrations, and the ratios of Th1:Th2 and the ratios of IFN-γ concentration/IL-4 concentration in nonpregnant women, normal pregnant women, postpartum women, and preeclamptic patients. The data were analysed by Fisher's Z-transformation test.
