METHODS: The double blind method was selected.

方法：随机双盲对照临床研究。

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Methods The random and double blind method was used.

方法采用随机双盲方法。

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METHODS: The double blind and random method was used.

方法：随机双盲双模拟对照试验。

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METHODS: The double blind and random method was used.

方法：随机双盲双模拟对照试验。

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