title: Trends in sex differences in mortality from heart disease: sex is not same as gender, and theory was first proposed in 1950s, say authors.
authors.forename: D A
authors.initials: DA
authors.lastname: Lawlor
authors.forename: S
authors.initials: S
authors.lastname: Ebrahim
authors.forename: G Davey
authors.initials: GD
authors.lastname: Smith
mesh_terms: D003327:Coronary Disease / Q000401:mortality*; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D008297:Male; D012307:Risk Factors; D012723:Sex; D012737:Sex Factors; D009626:Terminology as Topic