Letters on epidemiologic research methods.
D001943:Breast Neoplasms / Q000453:epidemiology*; D003237:Connecticut / Q000453:epidemiology; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D015994:Incidence; D008175:Lung Neoplasms / Q000453:epidemiology*; D008433:Mathematics; D012107:Research Design; D014594:Uterine Neoplasms / Q000453:epidemiology*