1. Youth Sport Research & Development Center, China Institute of Sport Science, Beijing, People’s Republic of China
2. Department of Health and Physical Education, The Education University of Hong Kong, Tai Po, New Territories, Hong Kong
3. Department of Physical Education, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong
4. Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong