title: The role of ecologic analysis in studies of the etiology of disease: a discussion with reference to large bowel cancer.
mesh_terms: D002104:Cadmium / Q000009:adverse effects; D002274:Carcinogens, Environmental / Q000032:analysis; D003110:Colonic Neoplasms / Q000453:epidemiology / Q000209:etiology* / Q000401:mortality; D004463:Ecology; D004781:Environmental Exposure; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008019:Life Style; D008297:Male; D012004:Rectal Neoplasms / Q000453:epidemiology / Q000209:etiology* / Q000401:mortality; D012306:Risk; D013223:Statistics as Topic; D014481:United States
chemical_list: D002274:Carcinogens, Environmental; D002104:Cadmium