title: Relationship as a clue to causation.
mesh_terms: D001161:Arteriosclerosis / Q000150:complications / Q000453:epidemiology; D048909:Diabetes Complications; D003920:Diabetes Mellitus / Q000453:epidemiology; D004194:Disease; D004812:Epidemiologic Methods; D005843:Geography; D006801:Humans; D007410:Intestinal Diseases / Q000453:epidemiology / Q000209:etiology; D009765:Obesity / Q000150:complications / Q000453:epidemiology