1. Department of Applied Social Sciences, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
2. School of Social and Political Sciences, Melbourne University, Melbourne, Australia
3. Department of Health and Physical Education, The Education University of Hong Kong, Tai Po, Hong Kong
4. Department of Educational Sciences and Teacher Education, University of Eastern Finland, Savonlinna, Finland
5. Department of Social Work and Social Administration, The University of Hong Kong, Pok Fu Lam, Hong Kong
6. Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA