1. Guangzhou Key Laboratory of Environmental Pollution and Health Assessment, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Epidemiology, School of Public Health, Sun Yat-Sen University, Guangzhou, China
2. Shenzhen Women’s and Children’s Hospital, Shenzhen, China
3. Foshan Women’s and Children’s Hospital, Foshan, China
4. Department of Information Management, Xinhua College, Sun Yat-Sen University, Guangzhou, China