1. Department of Clinical Sciences Lund, Orthopedics, Lund University, Lund, Sweden
2. Skåne University Hospital, Lund, Sweden
3. Department of Health Sciences, Lund University, Lund, Sweden
4. Department of Habilitation, Halmstad County Hospital, Halmstad, Sweden
5. Department of Clinical Sciences Lund, Paediatrics, Lund University, Lund, Sweden