title: [Epidemiological methods in chronic diseases: especially in collagen diseases].
authors.forename: H
authors.initials: H
authors.lastname: Yanagawa
mesh_terms: D002908:Chronic Disease; D003095:Collagen Diseases / Q000453:epidemiology*; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male