1. Department of Paediatrics & Adolescent Medicine, The University of Hong Kong, Hong Kong
2. Department of Social and Behavioural Sciences, City University of Hong Kong, Hong Kong
3. Faculty of Education, The University of Hong Kong, Hong Kong
4. Institute for Health and Sport, Victoria University, Melbourne, Australia
5. The Boys’ & Girls’ Clubs Association of Hong Kong, Hong Kong
6. Hong Kong Christian Service, Hong Kong