1. Department of Orthopaedics and Traumatology, Prince of Wales Hospital
2. The Hong Kong Jockey Club Sports Medicine and Health Sciences Centre, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
3. Department of Sports Science and Physical Education, Faculty of Education, The Chinese University of Hong Kong, Hong Kong, China
4. Oslo Sports Trauma Research Center, University of Sport and Physical Education, Ullevall Stadion, Oslo, Norway