title: [Is crack consumption spreading in Spain into groups that do not consume heroin?].
authors.forename: G
authors.initials: G
authors.lastname: Barrio
authors.forename: M J
authors.initials: MJ
authors.lastname: Bravo
authors.forename: L
authors.initials: L
authors.lastname: de la Fuente
authors.forename: L
authors.initials: L
authors.lastname: Royuela
mesh_terms: D000328:Adult; D019970:Cocaine-Related Disorders / Q000453:epidemiology*; D016578:Crack Cocaine; D005260:Female; D006556:Heroin Dependence / Q000453:epidemiology*; D006801:Humans; D008297:Male; D015995:Prevalence; D012959:Socioeconomic Factors; D013030:Spain / Q000453:epidemiology
chemical_list: D016578:Crack Cocaine