title: Observational studies of drug effectiveness.
authors.forename: Samy
authors.initials: S
authors.lastname: Suissa
mesh_terms: D000280:Administration, Inhalation; D000305:Adrenal Cortex Hormones / Q000627:therapeutic use*; D001249:Asthma / Q000188:drug therapy*; D015982:Bias; D015331:Cohort Studies; D004636:Emergency Service, Hospital; D006760:Hospitalization; D006801:Humans; D008484:Medicaid; D012720:Severity of Illness Index; D013781:Texas; D016896:Treatment Outcome
chemical_list: D000305:Adrenal Cortex Hormones