Department of Urology, Magna Graecia University of Catanzaro, Catanzaro, Italy. Electronic address: cantiello@unicz.it. Department of Diagnostic Imaging, Nuclear Medicine Unit, Magna Graecia University of Catanzaro, Catanzaro, Italy. Neuroimaging Research Unit, Institute of Molecular Bioimaging and Physiology, Italian National Research Council, Catanzaro, Italy. Urological Research Institute and Department of Urology, Vita e Salute-San Raffaele University of Milan, Milan, Italy. Department of Urology, European Institute of Oncology, Milan, Italy. Department of Human Pathology, Unit of Urology, University of Messina, Messina, Italy. Department of Urology, Magna Graecia University of Catanzaro, Catanzaro, Italy.