1. Department of Orthopaedics and Traumatology,
Turku University Hospital, P.O. Box 28, FIN-20701, Turku, Finland.
2. Department of Orthopaedics and Traumatology,
Kuopio University Hospital, P.O. Box 1777, FIN-70211, Kuopio, Finland.
3. Department of Orthopaedics and Traumatology,
Hatanpää Hospital, P.O. Box 437, FIN-33101, Tampere, Finland.
4. Medical Imaging Centre of Southwest Finland,
Turku University Hospital and Department of Diagnostic Radiology,
University of Turku, P.O. Box 52, FIN-20521, Turku, Finland.
5. Department of Biostatistics, University
of Turku, Lemminkäisenkatu 1, FIN-20520, Turku, Finland.