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To explore the possible association between internal exposure levels of 3-phenoxybenzoic acid (3-PBA), an urinary metabolite of pyrethroids, and altered semen quality in Chinese men.A retrospective case-control study.Center of clinical reproductive medicine.Three hundred seventy-six men with nonobstructive infertility.Urinary 3-PBA concentration, semen volume, sperm concentration, sperm number per...
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