title: Optimal intra-ampullary orientation with a pretrained sphincterotome.
authors.affiliation: Dept Med, Robert C. Byrd Health Sciences Center, Morgantown, WV 26506-9161, USA.
authors.forename: D G
authors.initials: DG
authors.lastname: Seibert
authors.forename: S R
authors.initials: SR
authors.lastname: Matulis
mesh_terms: D002760:Cholangiopancreatography, Endoscopic Retrograde; D006801:Humans; D016717:Sphincterotomy, Endoscopic / Q000295:instrumentation*