Until recently, the most important genetic risk factor for AD was the presence of the allele E4 of the apolipoprotein e, but recently other genetic polymorphisms of risks have been identified.

直至最近，AD最重要的遗传易感基因，载脂蛋白e - e4的等位基因才被发现，但是其他基因遗传多态性也被发现。

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And other researchers are examining the role of a bad gene, apolipoprotein E e4.

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