Maternal occupation and the risk of major birth defects: a follow-up analysis from the National Birth Defects Prevention Study.


This study further examined the association between selected maternal occupations and a variety of birth defects identified from prior analysis and explored the effect of work hours and number of jobs held and potential interaction between folic acid and occupation. Data from a population-based, multi-center case-control study was used. Analyses included 45… (More)
DOI: 10.1016/j.ijheh.2012.05.006


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