title: Correspondence (letter to the editor): Comparability of data is an issue.
authors.forename: Adrian
authors.initials: A
authors.lastname: Gillissen
mesh_terms: D003920:Diabetes Mellitus / Q000453:epidemiology*; D005260:Female; D006304:Health Status; D006331:Heart Diseases / Q000453:epidemiology*; D006801:Humans; D006973:Hypertension / Q000453:epidemiology*; D008019:Life Style; D008297:Male; D011788:Quality of Life; D012424:Rural Population / Q000706:statistics & numerical data*