title: Sheffield Assessment Instrument for Letters (SAIL).
authors.forename: Sarah J
authors.initials: SJ
authors.lastname: Bridges
authors.forename: Huw
authors.initials: H
authors.lastname: Thomas
mesh_terms: D004501:Education, Medical / Q000592:standards*; D004521:Educational Measurement; D004739:England; D006801:Humans; D015203:Reproducibility of Results