Based on previous prevalence study,a cohort of 77 occupational VCM-exposed workers was established to explore the progress of genetic damage and its influencing factors.
在以往现况调查的基础上,初步建立氯乙烯职业接触工人的研究队列,对氯乙烯作业工人随访3年,探讨低浓度接触氯乙烯后所致遗传损伤进程及其影响因素。
参考来源 - 氯乙烯作业工人职业接触评估和遗传损伤研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Methods Stratified sampling methods were used to carry out the prevalence study of maternity and child care for women at child bearing-age in Luochuan County and Bin County.
方法采用分层抽样，抽取洛川、彬县育龄妇女入户进行妇幼保健现状问卷调查。
One large scale study in Maryborough, Victoria, Australia showed the prevalence of mid-frontal baldness increases.
在澳大利亚维多利亚州马里伯勒进行的一项大规模研究表明，中额秃顶的患病率呈上升趋势。
However, no study on the prevalence of infertility has been conducted in this area.
但是，在这个地区不曾进行过任何关于不孕症流行情况的研究。
(OMITTED) It's still low prevalence, but you know we've just put out the synthesis report, which was an epidemiological study of HIV and its evolution in the region, and the report says that probably, at least for the near future, we'll never have an epidemic of HIV in the region.
VOA: standard.2010.07.07
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