Methods: Randomized double blind study was employed.
方法：随机双盲对照临床研究。
Methods a randomized, double blind study was performed.
方法采用随机、双盲研究方法。
DESIGN: Double blind, randomized controlled study.
设计：本研究采用双盲、随机、对照方法。
The data are from an extension study of a randomized, double-blind, placebo-controlled trial.
这些数据来自一个随机、双盲、安慰剂对照试验、根据研究。
The data are from an extension study of a randomized, double-blind, placebo-controlled trial.
这些数据来自一个随机、双盲、安慰剂对照试验、根据研究。
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