1. Department of Biostatistics and Epidemiology School of Public Health Sun Yat‐sen University Guangzhou China
2. School of Psychology and Counselling Queensland University of Technology Brisbane QLD Australia
3. Women’s and Children’s Hospital of Longhua District of Shenzhen Shenzhen China
4. Department of Maternal and Child Health School of Public Health Sun Yat‐sen University Guangzhou China
5. Department of Information Management Xinhua College of Sun Yat‐sen University Guangzhou China