1. Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
2. Department of Urology, University Hospital Southampton NHS Trust, Southampton, UK
3. Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho
4. ICVS/3B's-PT, Government Associate Laboratory, Braga/Guimarães
5. Deparment of Urology, Hospital of Braga, Braga, Portugal
6. Universitätsmedizin Mannheim, medical faculty Mannheim, Heidelberg university, Mannheim, Germany
7. Training and Research in Urological Surgery and Technology (T.R.U.S.T.)-Group, Hall in Tirol, Austria