a randomized double-blind study 随机双盲试验
Randomized double-blind parallel study 随机双盲平行研究
randomized double-blind controlled study 随机双盲对照实验
Randomized double-blind parallel contrast study 随机双盲平行对照研究
a double blind randomized study 随机双盲对照研究
multi-center double-blind randomized study 多中心双盲随机对照研究
METHODS: We conducted a multicenter, randomized, double - blind, parallel - treatment, placebo - controlled study in Japan.
方法：在日本进行一项多中心随机双盲对比治疗的安慰剂对照研究。
Efficacy and Safety of Prophylactic Large Dose of Tranexamic Acid in Spine Surgery: a Prospective, Randomized, Double-Blind, Placebo-Controlled Study.
预防性大剂量氨甲环酸在脊柱外科中的疗效和安全性：一个前瞻性，随机，双盲，安慰剂对照的研究。
Methods: Randomized double blind study was employed.
方法：随机双盲对照临床研究。
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