title: Prevalence of chronic health problems.
authors: J L
authors: JL
authors: Turabian
mesh_terms: D000368:Aged; D002908:Chronic Disease / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D013030:Spain / Q000453:epidemiology