[An epidemiological study on features of the distribution of cancer of some common sites].
D002681:China; D004938:Esophageal Neoplasms / Q000453:epidemiology*; D006801:Humans; D008113:Liver Neoplasms / Q000453:epidemiology*; D008175:Lung Neoplasms / Q000453:epidemiology*; D009303:Nasopharyngeal Neoplasms / Q000453:epidemiology*; D013274:Stomach Neoplasms / Q000453:epidemiology*