1. Department of Child and Adolescent Health, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
2. Department of Pediatrics, The First Affiliated Hospital, University of Science and Technology of China, Hefei, Anhui Province, China
3. Division of Birth Cohort Study, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, Guangdong Province, China