1. Oslo Sports Trauma Research Center Norwegian School of Sport Sciences Oslo Norway
2. Department of Arthroscopy and Sports Medicine, Oslo University Hospital Aker University of Oslo Oslo Norway
3. Department of Sports Science and Clinical Biomechanics, Research Unit of Musculoskeletal Function and Physiotherapy, The Faculty of Health Sciences University of Southern Denmark Odense Denmark
4. Department of Orthopedic Surgery Akershus University Hospital Oslo Norway
5. Department of Industriial and Social Sciences, Graduate School of Technology, Industrial and Social Sciences Tokushima University Tokushima Japan