title: Postal consent for upper gastrointestinal endoscopy.
authors.forename: S A
authors.initials: SA
authors.lastname: McClave
authors.forename: R L
authors.initials: RL
authors.lastname: Miller
mesh_terms: D016099:Endoscopy, Gastrointestinal; D006801:Humans; D007258:Informed Consent; D011177:Postal Service; D011446:Prospective Studies; D006113:United Kingdom