目的阐述在观察性流行病学研究中如何运用孟德尔随机化方法进行科学合理的病因推断，以控制混杂因素和反向因果关联对结果的影响。
Objective to explain how to use Mendelian randomization for reasonable etiological inferences to avoid confounding and reverse causation often seen in observational epidemiological studies.
引起病人的溶血性贫血的病因被依次推断为癌症，狼疮和戊型肝炎。
Various reasons for the patient to have hemolytic anemia were considered, including cancer, lupus and hepatitis E.
引起病人的溶血性贫血的病因被依次推断为癌症，狼疮和戊型肝炎。
Various reasons for the patient to have hemolytic anemia were considered, including cancer, lupus and hepatitis E.
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