1. San Paolo Bachelor School of Nursing, San Paolo Teaching Hospital, Via Ovada, 26 - 20142; Milan Italy
2. University of Milan, Via A. di Rudinì 8 - 20142; Milan Italy
3. Division of Urology, San Paolo Teaching Hospital, Va A. di Rudinì 8 - 20142; Milan Italy
4. Department of Epidemiology and Preventive Medicine, Universität Regensburg, Franz-Josef-Strauß-Allee 11 93053; Regensburg Germany
5. Milan
6. University of Milan; Via Ovada, 26 - 20142 Milan Italy