楼主: 史节
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阿司匹林-地高辛-本草-青蒿素-马兜铃酸 简论中药 |
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点评
讲过一万遍了,因为有安慰剂效应和自愈,必须要有试验组和对照组(服用安慰剂),试验组的结论要有显著差异才能证明疗法真实有效
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点评
+1
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