Case-control study.
D000328:Adult; D000368:Aged; D004812:Epidemiologic Methods; D006801:Humans; D008175:Lung Neoplasms / Q000139:chemically induced* / Q000401:mortality; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000139:chemically induced* / Q000401:mortality; D012767:Ships