1. Medical School of the University of Tampere, the Section of Orthopedics, Department of Surgery, Tampere University Hospital
2. Medical School of the University of Tampere, the Section of Orthopedics, Department of Surgery, Tampere University Hospital, Medical School of the University of Tampere, the Section of Orthopedics, Department of Surgery, Tampere University Hospital
3. Accident and Trauma Research Center, Urho Kaleva Kekkonen Institute, Tampere, Finland