Demographic characteristics and comparison of BLLs.
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There were 15,536 out-patients in this study. Based on sex, age and date of measuring BLLs, they were divided into different sub-groups. Student's t-test and ANOVA were used to compare BLLs among different subgroups. There was significant difference in all the sub-groups in statistics (p
创建时间：
2015-12-02
