Does displacement of lower pole stones during retrograde intrarenal surgery improves stone-free status? A systematic review and meta-analysis - Santana, Roberto Nogueira; Porto, Breno Cordeiro; Passerotti, Carlo Camargo; Artifon, Everson Luiz de Almeida; Otoch, José Pinhata; Cruz, José Arnaldo Shiomi da (Acta Cirúrgica Brasileira, 2023)