title: Comments on within-station between-sites variation.
authors.forename: Godfrey
authors.initials: G
authors.lastname: Pell
authors.forename: Richard
authors.initials: R
authors.lastname: Fuller
authors.forename: Trudie
authors.initials: T
authors.lastname: Roberts
authors.forename: Matthew
authors.initials: M
authors.lastname: Homer
mesh_terms: D002983:Clinical Competence / Q000592:standards*; D004504:Education, Medical, Undergraduate / Q000379:methods*; D004521:Educational Measurement / Q000379:methods*; D015203:Reproducibility of Results; D013337:Students, Medical