Kilicarslan, H.; Kaynak, Y.; Kordan, Y.; Kaygisiz, O.; Coskun, B.; Gunseren, K. O.; Kanat, F. M. Unfavorable Anatomical Factors Influencing the Success of Retrograde Intrarenal Surgery for Lower Pole Renal Calculi. Urol J 2015, 12, 2065-2068.