1. Administration Centre, Tampere University Hospital, Tampere, Finland
2. Central Finland Health Care District, Jyväskylä, Finland
3. Department of Orthopaedic and Trauma Surgery, Tampere University Hospital, Tampere, Finland
4. Faculty of Social Sciences, Tampere University, Tampere, Finland
5. Tays Research Services, Tampere University Hospital, Tampere, Finland
6. Faculty of Social Sciences, Health Sciences, Tampere University, Tampere, Finland