title: Appraising the evidence: what is selection bias?
authors.affiliation: Department of Psychological Medicine, Institute of Psychiatry, London, UK. m.henderson@iop.kcl.ac.uk
authors.forename: Max
authors.initials: M
authors.lastname: Henderson
authors.forename: Lisa
authors.initials: L
authors.lastname: Page
mesh_terms: D016022:Case-Control Studies; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D006801:Humans; D015983:Selection Bias