The possible role of chemical carcinogens.
D000818:Animals; D001943:Breast Neoplasms / Q000139:chemically induced* / Q000453:epidemiology; D002273:Carcinogens; D003276:Contraceptives, Oral / Q000009:adverse effects; D004777:Environment; D005260:Female; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology; D009374:Neoplasms, Experimental; D051381:Rats
D002273:Carcinogens; D003276:Contraceptives, Oral