Study demographics.
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a Odds ratio (95% CI) calculated using binary logistic regressionb Wilcoxon rank sum testc pack years equivalent to packs per day multiplied by years smokedd pack years dichotomised according to median e Pesticide exposure is equivalent to exposure of herbicides, pesticides, or fungicides at least once weekly for a period of six months.Study demographics.
创建时间：
2015-12-03
