1. University Hospital of Heraklion, University of Crete Medical School; Department of Urology; Heraklion Crete Greece
2. Academic Medical Center, University of Amsterdam; Department of Urology; Amsterdam Netherlands
3. University of Aberdeen; Academic Urology Unit; Health Sciences Building (second floor) Foresterhill Aberdeen Scotland UK AB25 2ZD
4. NHS Grampian, Aberdeen Royal Infirmary; Urology Department; Foresterhill Aberdeen Scotland UK AB25 2ZN
5. Academic Medical Centre, University of Amsterdam; Quality Assurance & Process Innovation, and Department of Surgery; J1b-215 Academic Medical Centre Meibergdreef 9, PO Box 22700 Amsterdam Netherlands 1100 DE