Institution: | 1.Department of Epidemiology and Health Statistics, School of Public Health, Guangxi Medical University, No. 22 Shuangyong Road, Nanning, 530021, Guangxi, China ;2.Guangxi Liuzhou Iron & Steel Group Co. Ltd Center for Disease Control and Prevention, Liuzhou, 545002, Guangxi, China ;3.Department of Sanitary Chemistry, School of Public Health, Guangxi Medical University, Nanning, 530021, Guangxi, China ;4.Department of Maternal, Child and Adolescent Health, School of Public Health, Guangxi Medical University, No. 22 Shuangyong Road, Nanning, 530021, Guangxi, China ; |