1. University of Rome Tor Vergata Section of Endocrinology and Medical Sexology (ENDOSEX), , Rome, Italy
2. IBSA Institut Biochimique SA, Pambio-Noranco , Switzerland
3. University of Florence IBSA Institut Biochimique SA Section of Urology, Careggi Hospital, , Pambio-Noranco, Florence, Italy
4. University of Turin Division of Urology, , Turin, Italy
5. University “Luigi Vanvitalli” of Naples Urology Unit, , Naples, Italy
6. University “Federico II” of Naples Andrology Unit, , Naples, Italy
7. University “Federico II” of Naples Urology Unit, , Naples, Italy
8. University of Chieti Department of Urology, SS Annunziata Hospital, , Chieti, Italy
9. University of Genova. Department of Urology, IRCCS Ospedale Policlinico San Martino, , Genova, Italy