1. Kyyhkylä Rehabilitation Center and Hospital, Mikkeli, Finland
2. Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
3. Department of Orthopaedics and Traumatology, Kuopio University Hospital and Bone Cartilage Research Unit, University of Eastern Finland, Kuopio, Finland
4. Institute of Clinical Medicine, Psychiatry. University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
5. Department of Physical and Rehabilitation Medicine, Kuopio University Hospital, Kuopio, Finland
6. Department of Neurosurgery, Kuopio University Hospital, Kuopio, Finland
7. Department of Orthopaedics and Traumatology, Kuopio University Hospital, Kuopio, Finland