Researchers have discovered that some people have a rare genetic mutation that decreases their cells' use of a particular growth hormone: insulin-like growth factor 1 (IGF1).
研究人员发现了一些人已经发生了极少量的基因变异，这种变异减少了细胞对某种生长激素（即，胰岛素样生长因子1（IGF1)）的使用。
A genetic factor, I do not know your baby have any calcium.
出了遗传的因素，不知道你的宝宝有没有补钙。
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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