1. Department of Surgery, Division of Urology, Kantonsspital Baden, 5404 Baden, Switzerland
2. Department of Radiology, Kantonsspital Baden, 5404 Baden, Switzerland
3. Department of Surgery and Transplantation, University Hospital Zürich, University of Zürich, 8006 Zürich, Switzerland
4. Department of Surgery, Kantonsspital Baden, 5404 Baden, Switzerland