www.cfsan.fda.gov/~Ird/dioxinqa.html; U.S. Environmental Protection Agency; Omega-3 Sources, USDA ; FDA, EPA Revise Guidelines on Mercury in Fish.Andersson AM, Skakkebaek NE. Exposure to exogenous estrogens in food: possible impact on human development and health. Eur J Endocrinol. 1999 Jun;140(6):477-85. Demers A, Ayotte P, Brisson J, Dodin S, Robert J, Dewailly E. Plasma concentrations of polychlorinated biphenyls and the risk of breast cancer: a congener-specific analysis.Am J Epidemiol. 2002 Apr 1;155(7):629-35. Charlier CJ, Albert AI, Zhang L, Dubois NG, Plomteux GJ. Polychlorinated biphenyls contamination in women with breast cancer. Clin Chim Acta. 2004 Sep;347(1-2):177-81. Ritchie JM, Vial SL, Fuortes LJ, Robertson LW, Guo H, Reedy VE, Smith EM. Comparison of proposed frameworks for grouping polychlorinated biphenyl congener data applied to a case-control pilot study of prostate cancer. Environ Res. 2005 May;98(1):104-13. Ritchie JM, Vial SL, Fuortes LJ, Guo H, Reedy VE, Smith