Feasibility of a single session retrograde endoscopic laser lithotripsy of two large stones located in a bifid urinary tract. Presentation of a rare case. - Kozyrakis, Diomidis; Zarkadas, Anastasios; Katsaros, Ilias; Mourkas, Vasileios; Kratiras, Zisis (Archives of Italian Urology & Andrology / Archivio Italiano di Urologia Andrologia, 2020)