1. Swiss Paraplegic Research Nottwil Switzerland
2. Department of Health Sciences and Medicine University of Lucerne Lucerne Switzerland
3. Department of Neuro‐Urology, Balgrist University Hospital University of Zürich Zürich Switzerland
4. Department of Urology, University Hospital Zürich University of Zürich Zürich Switzerland
5. Department of Urology Cantonal Hospital Aarau Aarau Switzerland
6. Department of Urology, Clinic for Urology University Hospital Bonn Bonn Germany
7. Department of Urology Winterthur Cantonal Hospital Winterthur Switzerland