1. Department of Women and Children’s Health Care, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
2. Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Service, Shanghai, China
3. Department of Health Policy and Management, College of Public Health, University of Georgia, Athens, GA, USA
4. Department of Child and Adolescent Health, School of Public Health, Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, China