1 Department of Medical, Oral and Biotechnological Sciences, Laboratory of Biostatistics, G. D'Annunzio University, Chieti, Italy.
2 School of Medicine, Division of Urology, Department of Oncology, San Luigi Gonzaga Hospital, University of Turin, Orbassano, Turin, Italy - [email protected].
3 Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy.
4 Department of Urology, San Carlo Di Nancy Hospital, Rome, Italy.