International data comparisons: caveat emptor.
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D002170:Canada / Q000453:epidemiology; D005060:Europe; D006801:Humans; D008403:Mass Screening; D009369:Neoplasms / Q000175:diagnosis / Q000453:epidemiology*; D012042:Registries; D012307:Risk Factors; D012309:Risk-Taking; D018426:SEER Program; D014481:United States / Q000453:epidemiology