1. Spine Clinic, Diagnostic Centre, Silkeborg Regional Hospital, Silkeborg, Denmark
2. Department of Clinical Social Medicine and Rehabilitation, Gødstrup Hospital, Herning, Denmark
3. University Research Clinic for Innovative Patient Pathways, Diagnostic Center, Silkeborg Regional Hospital, Silkeborg, Denmark
4. Center of Rehabilitation Research, DEFACTUM, Central Denmark Region, Aarhus, Denmark