# Double-balloon endoscopy-assisted bile duct biopsy with a long, tapered delivery system

**Authors:** Yuki Oka, Arata Sakai, Norimitsu Uza, Yuzo Kodama

PMC · DOI: 10.1055/a-2779-3500 · Endoscopy · 2026-02-03

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Source: https://tomesphere.com/paper/PMC12867567