Center for Disease Control and Prevention in Tangshan City, Tangshan, China;
Center for Disease Control and Prevention in Yutian County, Tangshan, China;
Medical College, Hubei Arts and Sciences University, Xiangyang, China;
School of Public Health, Hebei Union University, Tangshan, China;
Xingtai Medical Higher Junior College, Xingtai, China;
Breast; Cancer; DDT; HCH; Glutathione; S-Transferase; M1; (GSTM1); Endocrine; Disruptors; Gene; Polymorphism; Interaction;