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Distributions of specific gravity standardized maternal urinary replacement flame retardant metabolite concentrations (in μg/L) in urine samples from 12, 28, and 35 gestational weeks and the pooled urine sample. Intraclass correlation coefficients (ICCs) and 95% confidence intervals for the 12, 28, and 35 week samples were BCEP = 0.50, BDCPP = 0.60, and DPhP = 0.43
