title: Natural experiments and collaborative research.
authors.affiliation: Centre for Health and Medical Research, University of Teesside, Middlesbrough, UK.
authors.forename: N
authors.initials: N
authors.lastname: Oswald
mesh_terms: D004501:Education, Medical / Q000706:statistics & numerical data*; D006801:Humans; D012106:Research; D013334:Students / Q000706:statistics & numerical data*; D006113:United Kingdom