Asali M. Sheathed flexible retrograde intrarenal surgery without safety guide wire for upper urinary tract stones. Arch Ital Urol Androl [Internet]. 2022 Jun. 29 [cited 2024 May 20];94(2):186-9. Available from: https://www.pagepressjournals.org/aiua/article/view/aiua.2022.2.186