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Insertion of the sphincterotome into the antegrade guidewire (AGW) exiting the biliary orifice. End-to-end matching is attempted between the AGW and the sphincterotome. Then, the sphincterotome is placed into the AGW exiting the biliary orifice. Retrograde cannulation with the sphincterotome is attempted over the AGW. AGW = antegrade guidewire.
