1. School of Sexology, Department of Clinical, Applied and Biotechnological Sciences, University of L'Aquila, L'Aquila, Italy
2. Department of Urology, Sapienza University Rome, Rome, Italy
3. Department of Urology, Federico II University of Naples, Naples, Italy
4. Department of Urology, Urological Research Institute, University Vita-Salute San Raffaele, Milan, Italy
5. Division of Endocrinology, Sapienza University Rome, Rome, Italy