A spokesman added: 'The claim was supported by well-designed, double-blind, placebo-controlled human studies.

一位发言人补充道：“这个断言得到严格设计、双盲和安慰剂对照人体研究的支持。”

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The approval was based on data from 2 prospective, randomized, double-blind placebo-controlled clinical studies.

这次批准的依据是2次前瞻性随机双盲安慰剂控制对照临床研究的数据。

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Further prospective, double-blind, randomized, placebo - controlled studies are needed to assess the optimal overall treatment of this disease, the authors add.

作者称，需要进一步前瞻性，双盲，随机，安慰剂对照研究来评价该病的优化治疗方案。

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Studies that were often double-blind and placebo-controlled.

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