1. Child Health Advocacy Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
2. Department of Developmental and Behavioral Pediatrics, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
3. Department of Epidemiology, University of California Los Angeles, Los Angeles, CA, USA
4. Department of Health Policy and Management, College of Public Health, University of Georgia, Athens, GA, USA
5. Preschool Education Committee, Chinese Society of Education, Shanghai, China
6. Department of Preschool Education Information, Information Center, Shanghai Municipal Education Commission, Shanghai, China
7. Department of Basic Education, Shanghai Municipal Education Commission, Shanghai, China
8. Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China