1. Department of Urology; Santa Chiara Regional Hospital; Trento Italy
2. Klinik und Poliklinik für Urologie; Kinderurologie und Andrologie; Universitätsklinikum Giessen und Marburg GmbH; Justus-Liebig-Universität Giessen Germany
3. Department of Urology; University of Florence; Florence Italy
4. Sexually Transmitted Diseases Centre; Santa Maria Annunziata Hospital; Florence Italy
5. Department of Gynaecology and Obstetrics; University of Florence; Florence Italy