1. Unit of Urology, Department of Health Science, La Statale University of Milan, Milan, Italy
2. ASST Santi Paolo and Carlo, Milan, Italy
3. Department of Health Science, La Statale University of Milan, Italy
4. Unit of Anesthesiology, ASST Santi Paolo and Carlo, Milan, Italy
5. Unit of Urology, Prof. R. Coelho, Full Professor of Urology, University of Sao Paulo School of Medicine, Sao Paulo, Brazil