1. Orthopaedic Research Centre, Department of Orthopaedic Surgery, Clinic of Orthopaedics, Rheumatology and Dermatology, St. Olav’s Hospital HF, Trondheim, Norway
2. Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Science, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
3. Department of Mental Health, Faculty of Medicine and Health Science, NTNU, Norwegian University of Science and Technology, Trondheim, Norway