1. Department of Epidemiology and Health Statistics School of Public Health Fujian Medical University Fuzhou China
2. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden
3. Department of Breast Fujian Maternity and Child Health HospitalAffiliated Hospital of Fujian Medical University Fuzhou China
4. Chronic Disease Research Institute the Children's Hospital, and National Clinical Research Center for Child Health School of Public Health School of Medicine Zhejiang University Hangzhou China
5. Department of Nutrition and Food Hygiene School of Public Health Zhejiang University Hangzhou China