1 Department of Urology, Onze-Lieve-Vrouw Hospital, Aalst, Belgium; OLV Vattikuti Robotic Surgery Institute, Melle, Belgium. Electronic address: a.mottrie@telenet.be.
2 OLV Vattikuti Robotic Surgery Institute, Melle, Belgium; Division of Oncology/Unit of Urology, IRCCS Ospedale San Raffaele, Milan, Italy.