1. School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, China
2. The First Affiliated Hospital, Xi’an Jiaotong University Health Science Center, Xi’an, China
3. Department of Maternal and Child Health Management, Sichuan Provincial Maternity and Child Health Care Hospital, Chengdu, China
4. Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi’an, China
5. Key Laboratory of Environment and Genes Related to Diseases (Xi’an Jiaotong University), Ministry of Education of China, Xi’an, China
6. Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
7. Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK