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A researcher gave a questionnaire on past exposures to pesticide to a group of people who had recently been diagnosed with pancreatic cancer and to
A researcher gave a questionnaire on past exposures to pesticide to a group of people who had recently been diagnosed with pancreatic cancer and to another group of people who were cancer free. is an example of a/an Select one: a. Case-control study b. Cross-sectional study c. Ecological study d. Retrospective cohort study e. Prospective cohort study
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