title: Administrative database: validity of recording vs. validity of diagnosis.
authors.forename: Yves
authors.initials: Y
authors.lastname: Lacasse
authors.forename: Victor M
authors.initials: VM
authors.lastname: Montori
authors.forename: François
authors.initials: F
authors.lastname: Maltais
mesh_terms: D000368:Aged; D001249:Asthma / Q000175:diagnosis*; D016208:Databases, Factual; D003937:Diagnosis, Differential; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis*; D015203:Reproducibility of Results