1. Centre for Health Behaviours Research, JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
2. Shenzhen Research Institute, the Chinese University of Hong Kong, Shenzhen, China
3. Department of Early Childhood Education, Faculty of Education and Human Development, The Education University of Hong Kong, Hong Kong SAR, China
4. Department of Health Behavior, Gillings School of Global Public Health, the University of North Carolina at Chapel Hill, North Carolina, USA