1. Department of Hand Surgery, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
2. Department of Orthopedics and Traumatology, Kanta-Häme Central Hospital, Hämeenlinna, Finland
3. Department of Orthopedics and Traumatology, South Karelia Central Hospital, Lappeenranta, Finland
4. Department of Orthopedics and Traumatology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
5. Department of Orthopedics and Traumatology, Päijät-Häme Central Hospital, Lahti, Finland