Institution: | 1.Department of Sanitary Chemistry, School of Public Health, Guangxi Medical University, Nanning, Guangxi, 530021, China ;2.Huaihua Center for Disease Control and Prevention, Huaihua, 418000, Hunan, China ;3.Department of Epidemiology and Health Statistics, School of Public Health, Guangxi Medical University, Nanning, 530021, Guangxi, China ;4.Medical Administration Division, The First Affiliated Hospital of Hebei North University, Zhangjiakou, Hebe, 075000, China ;5.Department of Nutrition, RuiKang Hospital Affiliated to Guangxi University of Traditional Chinese Medicine, Nanning, 530011, Guangxi, China ;6.Department of Child and Adolescent Health & Maternal and Child Health, School of Public Health, Guangxi Medical University, Nanning, 530021, Guangxi, China ; |