- Ortwin Heißler: Department of Urology, Landesklinikum Baden-Mödling, Baden, Austria.
- Stephan Seklehner: Department of Urology, Landesklinikum Baden-Mödling, Baden, Austria.
- Claus Riedl: Department of Urology, Landesklinikum Baden-Mödling, Baden, Austria.