1. Department of Radiotherapy, Cremona Social and Territorial Health Company (ASST), Cremona, Italy
2. Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
3. Peter MacCallum Cancer Centre, Department of Radiation Oncology, Moorabbin Campus, East Bentleigh, Victoria, Australia
4. Urology Unit, Casa di Cura S. Camillo, Cremona, Italy
5. Department of Medical, Surgical and Neurological Sciences, University Hospital of Siena, Siena, Italy