1. Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway
2. Health Research Institute, Department of Cognitive and Learning Sciences, Michigan Technological University, Houghton, MI, USA
3. Department of Orthopaedics and Traumatology, Prince of Wales Hospital, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
4. Office of Student Affairs, Lingnan University, Hong Kong, China