方法我们进行了一项多中心、随机、双盲试验，纳入先兆子痫危险低的未经产妇女。
Methods We conducted a multicenter, randomized, double-blind trial involving nulliparous women who were at low risk for preeclampsia.
然而，极具讽刺的是，通过使用无烟烟草戒烟与使用安慰对照组相比，临床对照控制组没有进行随机的双盲试验。
Most devastatingly, however, there are no randomized, double-blinded placebo controlled clinical trials that compare the success of quitting smoking by using smokeless tobacco versus using a placebo.
摘要目的：红外热像是潜在的适用于中医保健领域的成像技术。本研究通过开展随机双盲试验探讨其应用方法与可行性。
Abstract Objectives: Infrared thermal imaging ( IT I) has potential for application in the health care field of Chinese Medicine.
最初的PLX4032的试验证明它在延长患者生命方面同ipilimumab一样好，甚至比ipilimumab更好，全规模的双盲试验目前正在进行中。
Initial trials of PLX4032 suggest it may be as good as, or even better than, ipilimumab at improving sufferers' survival. A full-scale, double-blind trial is now under way.
最初的PLX4032的试验证明它在延长患者生命方面同ipilimumab一样好，甚至比ipilimumab更好，全规模的双盲试验目前正在进行中。
Initial trials of PLX4032 suggest it may be as good as, or even better than, ipilimumab at improving sufferers' survival. A full-scale, double-blind trial is now under way.
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