title: Definitions of chronic health conditions in childhood.
authors.forename: Jose M
authors.initials: JM
authors.lastname: Valderas
authors.forename: Barbara
authors.initials: B
authors.lastname: Starfield
authors.forename: Chris
authors.initials: C
authors.lastname: Salisbury
mesh_terms: D000293:Adolescent; D002648:Child; D002908:Chronic Disease / Q000453:epidemiology*; D015897:Comorbidity; D006801:Humans