This study was designed as randomized, double-blind and crossover trials.
本研究是采取随机、双盲、交叉试验设计。
These patients had acne vulgaris ranging from mild to severe and were a subgroup of patients from phase 3, randomized, double-blind, vehicle-controlled, multicenter clinical trials.
这些患者有轻到重度痤疮，是基质对照随机双盲多中心3期临床试验的一个亚组。
The methodological quality of included trials was generally "poor." Few trials reported methods of randomization. Three trials were randomized, double blind, and placebo-controlled.
很少有实验报道随机取样的方法。内含的试验方法的质量一般很弱。三种试验分别为随机取样、双盲法、安慰剂给样试验。
The review cites seven randomized, double-blind controlled trials of black cohosh for treatment of postmenopausal symptoms, three of which showed benefit from the herb.
这篇综述引用了7个用黑升麻治疗绝经后综合症的随机、双盲对照试验结果。
Randomized, there are placebo-controlled, double-blind, multi-center clinical trials to prove efficacy is a reliable method.
随机分组、有安慰剂对照、双盲、多中心的临床试验，才是证明疗效的可靠方法。
Randomized, there are placebo-controlled, double-blind, multi-center clinical trials to prove efficacy is a reliable method.
随机分组、有安慰剂对照、双盲、多中心的临床试验，才是证明疗效的可靠方法。
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