Characteristics of 158 Petrochemical Workers and 50 Controls, Bulgaria from 1999– 2000.
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Abbreviations: ETS, environmental tobacco smoke.*PaCategorical variables are expressed as n (%), and continuous variables are expressed as mean (SD).bP-values were obtained from Pearson’s chi-square test for categorical variables and Welch two-sample t-test for continuous variables and Wilcoxon rank-sum test for non-normally distribution variables.
创建时间：
2015-12-02
