1. Department of Orthopaedics, Traumatology and Hand Surgery, Kuopio University Hospital, Kuopio, Finland
2. Department of Development and Quality, Kuopio University Hospital, Kuopio, Finland
3. Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
4. Department of Orthopaedics, Traumatology and Hand Surgery, Kuopio University Hospital, P.O. Box 1777, Kuopio, 70211, Finland