A team of researchers conducted a prospective cohort study t…
A team of researchers conducted a prospective cohort study to determine if children who are born to mothers who took folic acid during pregnancy are less likely to develop leukemia. The average age at which childhood leukemia is diagnosed is about 2 years old. To ensure that leukemia is detectable in the children included in the study, the researchers decided to follow mothers and their children from pregnancy until the age of 3. What period did the researchers consider when determining the length of follow-up?
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