1. Department of Neonatology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
2. Department of Fetal Medicine, First Maternity and Infant Hospital Affiliated to Shanghai Tongji University, Shanghai, China
3. Department of Obstetrics, First Maternity and Infant Hospital Affiliated to Shanghai Tongji University, Shanghai, China
4. MOE-Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
5. Center for Global Health and Health Policy, Global Health and Education Projects, Inc, Riverdale, MD, USA