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一项研究测试4种药物剂量(低、中、高、安慰剂)对20个患者/组的体重减轻(kg)的影响。分析方法是什么?
一项研究测试4种药物剂量(低、中、高、安慰剂)对20个患者/组的体重减轻(kg)的影响。分析方法是什么?
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