1. Department of Hand Surgery, Skåne University Hospital Malmö, Malmö, Sweden;
2. Department of Clinical Sciences, Lund University, Lund, Sweden;
3. Department of Radiology, Örebro University Hospital, Örebro, Sweden;
4. Pulvertaft Hand Centre, Derby, UK;
5. Department of Orthopedics, Clinical Sciences, Lund University and Skåne University Hospital Lund, Lund, Sweden