1. Department of Midwifery, Physiotherapy, Occupational Therapy and Psychomotor Therapy, University College Copenhagen, Copenhagen, Denmark
2. Musculoskeletal Tumour Section, Department of Orthopaedic Surgery, University Hospital Rigshospitalet, Copenhagen, Denmark
3. National Research Centre for the Working Environment, Copenhagen, Denmark
4. Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark