title: The significance of case-control studies.
mesh_terms: D000367:Age Factors; D000403:Airway Resistance; D001827:Body Height; D001835:Body Weight; D001991:Bronchitis / Q000097:blood / Q000175:diagnosis / Q000453:epidemiology*; D003371:Cough / Q000209:etiology; D004391:Dust; D004812:Epidemiologic Methods; D008669:Metallurgy; D009784:Occupational Diseases / Q000453:epidemiology*; D010100:Oxygen / Q000097:blood; D010313:Partial Pressure; D012907:Smoking; D013997:Time Factors; D014797:Vital Capacity
chemical_list: D004391:Dust; D010100:Oxygen