Statistics in medical research.
Parker
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D001699:Biometry; D016022:Case-Control Studies; D006801:Humans; D007938:Leukemia / Q000188:drug therapy / Q000401:mortality; D008175:Lung Neoplasms / Q000453:epidemiology / Q000209:etiology; D009369:Neoplasms / Q000453:epidemiology*; D012107:Research Design; D012907:Smoking; D015996:Survival Rate