Cellular and molecular mechanisms mediating the effects of polychlorinated biphenyls on oocyte developmental competence in cattle& T2 f7 i3 [$ q( s3 ` http://www.ncbi.nlm.nih.gov/pubmed/11746964 , Q3 \" m0 a4 K# p4 C2 FCellular and molecular mechanisms mediating the effect of polychlorinated biphenyls on oocyte in vitro maturation3 Z$ T+ M5 z4 c1 A ~ http://www.ncbi.nlm.nih.gov/pubmed/16781112