1 Department of Nursing, School of Health and Welfare, Jönköping University, Jönköping, Sweden.
2 International Gaming Research Unit, Psychology Department, Nottingham Trent University, Nottingham, UK.
3 Jianan Psychiatric Center, Ministry of Health and Welfare, Tainan, Taiwan; Department of Natural Biotechnology, NanHua University, Chiayi 622, Taiwan.
4 Department of Orthopedic Surgery, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; Department of Orthopedic Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
5 Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Hong Kong. Electronic address: cy.lin@polyu.edu.hk.