1. Key Laboratory of
Public Health Safety of Ministry of Education, School of Public Health, Fudan University, Shanghai 200032, People’s Republic of China
2. Haimen City Center for Disease Control and Prevention, Haimen, Jiangsu 226100, People’s Republic of China
3. Yuhuan County Maternal and Child Health Hospital, Yuhuan, Taizhou, Zhejiang 317600, People’s Republic of China
4. Yuhuan County Center for Disease Control and Prevention, Yuhuan, Taizhou, Zhejiang 317600, People’s Republic of China
5. Taizhou City Center for Disease Control and Prevention, Taizhou, Zhejiang 318000, People’s Republic of China
6. School of Epidemiology, Public Health and Preventive
Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada