The indicator whether participant/subject used broadleaf herbicide products containing 2,4-Dichlorophenoxyacetic acid (2,4-D) at work from age 36 to 45 as part of the Risk Factor Questionnaire (RFQ-U) for Pesticide (Work).
The indicator whether participant/subject used broadleaf herbicide products containing 2,4-Dichlorophenoxyacetic acid (2,4-D) at work from age 36 to 45 as part of the Risk Factor Questionnaire (RFQ-U) for Pesticide (Work).
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Epi Info: http://wwwn.cdc.gov/epiinfo/index.htm RFQ-U CRFs, Version 1.0 developed by the Epidemiology Working Group of the collaborative centers for PD.