1. Department of Radiology Swiss Paraplegic Centre Nottwil Switzerland
2. Image Sciences Institute, Division Imaging & Oncology University Medical Center Utrecht Utrecht the Netherlands
3. Rehabilitation and Quality Management Swiss Paraplegic Centre Nottwil Switzerland
4. Department of Health Sciences and Medicine University of Lucerne Lucerne Switzerland
5. Clinical Trial Unit Swiss Paraplegic Centre Nottwil Switzerland
6. Department of Health Sciences and Medicine, Biostatistics and Methodology University Lucerne Lucerne Switzerland
7. Neurology Department, UMC Utrecht Brain Center University Medical Center Utrecht Utrecht the Netherlands