Methods. Single-centre, randomized, prospective, double-blinded comparison of bosentan and placebo.
方法：单中心，随机，前瞻性，双盲比较波生坦和安慰剂。
Methods The effects of zinc supplementation were assessed in a double-blinded randomized control design.
方法随机双盲对照法补锌干预研究。
Trials were included if they were randomized, double-blinded, and controlled with placebo or active comparator.
这些试验包括，是否是随机，双盲，安慰剂对照或活动比较仪。
The trial was randomized and double-blinded, with 294 infants receiving inhaled nitric oxide and 288 receiving a placebo.
这一实验采取的是随机法和双盲法，294个婴儿吸入笑气，288个婴儿用的是安慰剂。
A total of 19 trials (16,390 patients) were included and these were all randomized, double-blinded and controlled with a placebo or with an active comparator.
总共有19个研究包含在内（有16390人参与），所有的研究都是随机的、双盲的、有安慰剂对照或者其他有效的对照。
They had assumed that these types of devices should and would be subject to random double-blinded studies with controls over an appropriate time-frame to investigate safety and efficacy.
他们原先认为，这些类型的设备应该也将会在适当的时间框架内接受随机、双盲对照研究，对其安全性和有效性进行调查。
RESEARCH DESIGN AND METHODS The Hyperbaric Oxygen Therapy in Diabetics with Chronic Foot Ulcers (HODFU) study was a randomized, single-center, double-blinded, placebo-controlled clinical trial.
研究设计和方法对于患有慢性足部溃疡的糖尿病患者，超高压氧气疗法（HODFU）研究采用了随机分组、单中心、双盲、安慰剂对照的临床试验。
Both the lung and lymph node tissues of patients with adenoviral pneumonia were observed, using a double-blinded meth, to determine the amount of inclusion bodies and function of the lymph nodes.
本文利用双盲法分别观察了腺病毒肺炎的肺组织及淋巴结组织切片，并按一定的方法判定包含体的数量及淋巴结功能。
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.
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。
Design: Double blinded and randomized design.
设计随机分组双盲设计。
Methods parallel group, stratified randomization, double blinded, muti-center clinical trail was designed.
方法采取平行组设计、分层随机、双盲、多中心临床试验方法。
DESIGN: a complete randomized double blinded grouping study was conducted.
设计：完全随机、双肓法分组研究。
However, I know of no double blinded, extended studies to test the effects of long-term antibiotics on ankylosing spondylitis.
不过，据我所知，没有双盲，扩展研究，以检验对强直性脊柱炎的长期抗生素的影响。
However, I know of no double blinded, extended studies to test the effects of long-term antibiotics on ankylosing spondylitis.
不过，据我所知，没有双盲，扩展研究，以检验对强直性脊柱炎的长期抗生素的影响。
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