Carbon dioxide digital subtraction enterography for route identification in post-Roux-en-Y biliary interventions - Maruyama, Akihiro; Kobayashi, Makoto; Takeshima, Hirotaka; Nakayabu, Hiroshi; Kato, Hiroki; Tominaga, Shintaro; Yano, Motoyoshi (Endoscopy, 2025)