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The "Bilio-Papillary Z Line": Proposal for a Novel Quality Indicator of Direct Cholangioscopy

Beyna T, Farnik H, Sarrazin C, Gerges C, Neuhaus H, Albert JG. Direct retrograde cholangioscopy with a new prototype double-bending cholangioscope. Endoscopy 2016;48:929-933. https://doi.org/10.1055/s-0042-110395
Zimmer V. Novel biopsy forceps anchoring technique for completion of direct cholangioscopy after freehand intubation. Dig Endosc 2017;29:638-639. https://doi.org/10.1111/den.12870
Zimmer V. Knock-knock-knockin' on bile duct's door: the "tip-of-thebiopsy-forceps technique" - probing the route during freehand-intubated direct cholangioscopy. Endoscopy 2017;49:E153-E154. https://doi.org/10.1055/s-0043-106047

Choledochoscopy: An update vol.13, pp.12, 2018, https://doi.org/10.4253/wjge.v13.i12.571