Biliary cannulation in endoscopic retrograde cholangiography: How to tackle the difficult papilla. Op den Winkel M, Schirra J, Schulz C, De Toni EN, et al. Dig Dis 2021 Mar 8. pii: 000515692. doi: 10.1159/000515692.

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Op den Winkel M, Schirra J, Schulz C, De Toni EN, et al. Biliary cannulation in endoscopic retrograde cholangiography: How to tackle the difficult papilla. Dig Dis 2021 Mar 8. pii: 000515692. doi: 10.1159/000515692.
PMID: 33684915