Boulalas, Ioannis, Mauro De Dominicis, and Lorenzo Defidio. 2018. “Semirigid Ureteroscopy Prior Retrograde Intrarenal Surgery (RIRS) Helps to Select the Right Ureteral Access Sheath”. Archivio Italiano Di Urologia E Andrologia 90 (1):20-24. https://doi.org/10.4081/aiua.2018.1.20.