1. Department of Orthopedic Surgery, Slagelse & Holbæk Hospital, Region Sjaelland, Denmark
2. Faculty of Health, Department of Health Sciences, Lund University, Lund, Sweden
3. Faculty of Health, Department of Health Sciences, Karlstad University, Karlstad, Sweden
4. Institute of Health, Section of Nursing, Aarhus University, Aarhus, Denmark