Q:

Japan has a high rate of stomach carcinoma and a low rate of colon carcinoma than the U.S. Which study would you suggest to prove or support the environmental effect on the incidence of these cancers?

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Japan has a high rate of stomach carcinoma and a low rate of colon carcinoma than the U.S. Which study would you suggest to prove or support the environmental effect on the incidence of these cancers?


  1. Migrant studies
  2. Case control
  3. Incidence
  4. Case reports
  5. Mortality survey

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a) Migrant studies

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