An epidemiological study concerning herbicides.
D000640:Amitrole / Q000009:adverse effects; D006540:Herbicides / Q000009:adverse effects*; D006801:Humans; D008175:Lung Neoplasms / Q000139:chemically induced*; D009784:Occupational Diseases / Q000453:epidemiology*; D011890:Railroads; D013548:Sweden
D006540:Herbicides; D000640:Amitrole