设计：前瞻性群组研究。
在这组前瞻性群组研究中，我们检验CLL通常来自于MBL的假设。
In this prospective cohort study, we tested the hypothesis that CLL is always preceded by MBL.
此九项研究均为运用米非司酮和米索前列醇诱导药物流产的前瞻性群组研究。
All were prospective cohort studies that used mifepristone and misoprostol to induce abortion.
对比较在家里或在诊所进行药物流产的随机对照试验和前瞻性群组研究进行系统搜索。
A systematic search for randomized controlled trials and prospective cohort studies comparing home-based and clinic-based medical abortion was conducted.
前瞻性群组研究并未显示各个国家以家为基础和以诊所为基础的药物流产在有效性或可接受性方面的差异。
Prospective cohort studies have shown no differences in effectiveness or acceptability between home-based and clinic-based medical abortion across countries.
2003年至2005年进行的前瞻性以人群为基础的群组研究项目在研究地区招募了怀孕20—26周的妇女。
Study area women were enrolled at 20-26 weeks' gestation in a prospective population-based cohort study that was conducted from 2003 to 2005.
2003年至2005年进行的前瞻性以人群为基础的群组研究项目在研究地区招募了怀孕20—26周的妇女。
Study area women were enrolled at 20-26 weeks' gestation in a prospective population-based cohort study that was conducted from 2003 to 2005.
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