title: It's not the precut; it's the why done and who by.
authors.forename: Peter B
authors.initials: PB
authors.lastname: Cotton
mesh_terms: D002404:Catheterization / Q000009:adverse effects* / Q000379:methods; D002760:Cholangiopancreatography, Endoscopic Retrograde; D006801:Humans; D018570:Risk Assessment