title: What is comorbidity--fact or artefact?
authors.affiliation: Max Planck Institute of Psychiatry (Clinical Institute), München, Germany.
authors.forename: H U
authors.initials: HU
authors.lastname: Wittchen
mesh_terms: D015897:Comorbidity; D006801:Humans; D001523:Mental Disorders / Q000453:epidemiology* / Q000209:etiology; D009626:Terminology as Topic