Question: Select all the studies where the explanatory variable is measured at the same time as the outcome variable. Cohort Cross-Sectional O Case-Control Clinical Trial

Select all the studies where the explanatory variable is measured at

the same time as the outcome variable. Cohort Cross-Sectional O Case-Control Clinical

Select all the studies where the explanatory variable is measured at the same time as the outcome variable. Cohort Cross-Sectional O Case-Control Clinical Trial

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