Endoscopic Bilateral Drainage Techniques of Malignant Hilar Biliary Obstruction: Stent-In-Stent or Side-By-Side? A Systematic Review and Meta-Analysis - de Souza, GMV; Ribeiro, IB; Funari, MP; de Moura, DTH; Scatimburgo, MVCV; de Freitas Júnior, JR; Baracat, R; de Moura, ETH; Bernardo, WM; de Moura, EGH (Endoscopy, 2021)