1. Ministry of Education–Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
2. Department of Epidemiology and Biostatistics, University of South Carolina, Columbia, South Carolina
3. Department of Neonatology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
4. School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China