中药有多少做了大规模试验的，药效和过安慰剂对比过的？

来源: 俊牛于 2014-05-09 16:54:22 [旧帖] [给我悄悄话] 本文已被阅读：次

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中药有多少 做了大规模试验的， 药效和过安慰剂对比过的？