1 Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei 230032, Anhui, China.
2 Ningxia Rehabilitation Medical Center, People's Hospital of Ningxia Hui Autonomous Region, No. 301 Zhengyuan North Street, Yinchuan 750002, Ningxia, China.
3 Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei 230032, Anhui, China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No. 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No. 81 Meishan Road, Hefei 230032, Anhui, China. Electronic address: supuyu@ahmu.edu.cn.
4 Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei 230032, Anhui, China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No. 81 Meishan Road, Hefei 230032, Anhui, China; Anhui Provincial Key Laboratory of Population Health and Aristogenics, No. 81 Meishan Road, Hefei 230032, Anhui, China. Electronic address: wanggenfu@ahmu.edu.cn.