title: Reply from the authors.
authors.affiliation: London, UK.
authors.forename: D N
authors.initials: DN
authors.lastname: Hunter
authors.forename: S
authors.initials: S
authors.lastname: Webb
mesh_terms: D000776:Anesthesiology / Q000379:methods*; D002983:Clinical Competence; D016292:Procedural Sedation / Q000379:methods* / Q000451:nursing*; D006801:Humans