title: On understanding ageing: design and inferences.
authors.forename: M
authors.initials: M
authors.lastname: Luszcz
mesh_terms: D000368:Aged; D000375:Aging / Q000502:physiology*; D003071:Cognition / Q000502:physiology; D003430:Cross-Sectional Studies; D006801:Humans; D008137:Longitudinal Studies