title: Acute respiratory disease in Spain: some epidemiologic concerns.
authors.forename: A
authors.initials: A
authors.lastname: Trilla
authors.forename: J
authors.initials: J
authors.lastname: Mensa
authors.forename: E
authors.initials: E
authors.lastname: Soriano
mesh_terms: D006801:Humans; D012141:Respiratory Tract Infections / Q000453:epidemiology*; D015983:Selection Bias; D013030:Spain / Q000453:epidemiology