IQR increases in visit 2 1-OH-PYR and 2-OH-FLU showed a marginally significant association with reduced gestational age (β: −0.23, 95 % CI: −0.46, 0.00; β: −0.21, 95 % CI: −0.43, 0.01).
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Associations between urinary hydroxylated polycyclic aromatic hydrocarbon biomarker concentrations and measures of timing of delivery and infant size at birth.
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