title: A study of precursor illness in lung cancer patients.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001847:Bone Diseases / Q000453:epidemiology; D002908:Chronic Disease; D003643:Death; D006801:Humans; D007410:Intestinal Diseases / Q000453:epidemiology; D007592:Joint Diseases / Q000453:epidemiology; D008175:Lung Neoplasms / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D008487:Medical History Taking; D001523:Mental Disorders / Q000453:epidemiology; D008875:Middle Aged; D009422:Nervous System Diseases / Q000453:epidemiology; D009790:Occupations; D010437:Peptic Ulcer / Q000453:epidemiology; D010532:Peritoneal Diseases / Q000453:epidemiology; D012111:Residence Characteristics; D012140:Respiratory Tract Diseases / Q000453:epidemiology; D012189:Retrospective Studies; D012494:Sampling Studies; D012907:Smoking / Q000453:epidemiology; D013272:Stomach Diseases / Q000453:epidemiology