有研究者提示,要注意“sicker user effect”。就是说有人身体不好了,就开始吃维他命了,会倾斜统计结果。
有研究者提示,要注意“sicker user effect”。就是说有人身体不好了,就开始吃维他命了,会倾斜统计结果。
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