a significant trendp <0.05
In order to try to identify the pure impact of skill on the AUL rate ( Figure 2 ), we first selected the cases from 2006 to 2008 (carried out by the same urologist) demonstrating a significant trend (from 31.6% to 21.7%, p <0.05); then, we considered only the cases performed by in the last 3 years by the same surgeon (FDM) using the CORPUS technique.