1. Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China;
2. University of Chinese Academy of Sciences, Beijing, China;
3. State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, China;
4. Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, China