1. Department of Urology; Eberhard-Karls University Tuebingen; Tuebingen Germany
2. PMU; Salzburg Austria
3. Department of Urology; Medical University of Vienna; Vienna Austria
4. Klinikum Lippe; Detmold Germany
5. Neuro-Urology; Swiss Paraplegic Center; Nottwil Switzerland
6. Department of Clinical Medicine; Aarhus University; Aarhus Denmark