title: Was the study big enough? Two café rules.
authors.affiliation: Centre for Evidence-Based Medicine, University of Oxford, Oxford, UK.
authors.forename: Paul
authors.initials: P
authors.lastname: Glasziou
authors.forename: Helen
authors.initials: H
authors.lastname: Doll
mesh_terms: D016001:Confidence Intervals; D019317:Evidence-Based Medicine; D006801:Humans; D018401:Sample Size