1. Optimed; Clinical Research Centre; Copenhagen University Hospital; Hvidovre Denmark
2. Department of Orthopaedic Surgery; Copenhagen University Hospital; Hvidovre Denmark
3. Faculty of Health Sciences; University of Southampton; Southampton UK
4. Section of Biostatistics; Department of Public Health; University of Copenhagen; Copenhagen Denmark
5. RUBRIC (Research Unit on Brain Injury Rehabilitation Copenhagen); Department of Neurorehabilitation; Traumatic Brain Injury Unit; Rigshospitalet; Copenhagen Denmark
6. Section of Nursing Science; Department of Health; Aarhus University; Aarhus Denmark