1. Hellenic Minimally Invasive and Robotic Surgery (MIRS) Study Group, National and Kapodistrian University of Athens, Medical School, Agiou Thoma 15b, Goudi, Athens 11527, Greece
2. First Department of Urology, National and Kapodistrian University of Athens, Medical School, Agiou Thoma 17, Goudi, Athens 11527, Greece
3. Second Department of Propaedeutic Surgery, National and Kapodistrian University of Athens, Medical School, Agiou Thoma 17, Goudi, Athens 11527, Greece.