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. 2005 May 26;113(10):1277–1284. doi: 10.1289/ehp.7745

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Principal component analysis of the measured parameters of the serum samples. Abbreviations: Fraction (ER), number of estrogenic samples of the fraction of POPs; fraction (anti-ER), number of anti-estrogenic samples of the fraction of POPs; ∑PCBs, serum of 17 PCB congeners.