方法采用随机双盲、安慰剂平行对照研究。
Methods A random, double blind, and placebo control study was conducted.
方法：采用随机、双盲双模拟、平行对照方法。
METHODS: It was a randomized, double blind, double model, parallel controlled clinical trial.
方法：采用随机、双盲双模拟、平行对照方法。
METHODS: It was a randomized, double blind, double model, parallel controlled clinical trial.
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