Because patients with a particular genetic variant might not respond well to that drug.

因为带有特定基因的患者会对此药物产生不良反应。

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The researchers found one genetic variant was strongly associated with RLS with periodic limb movements.

研究人员发现一种基因变体与RLS的周期性肢体运动十分相关。

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The Nature study highlighted one common genetic variant which, if corrected would cut cases of autism by 15%.

刊登在《自然》杂志上的这项研究特别标出了一个常见的基因变异。 如果能将其修复，孤独症病例可能会减少15%。

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In May two rival research groups discovered a genetic variant--make that a flaw--on chromosome 9 that may boost the risk of early heart attack by as much as 70%.

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But a subset of patients who did not have a genetic variant called APOE4, showed statistically significant improvements across four different tests for Alzheimer's symptoms, Wyeth and Elan said, when compared to a control group of patients who did not get the drug.

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In the third study, which also looked at children in New York City, researchers found that the association between organophosphate exposure and developmental delays was more pronounced in children whose mothers had a certain genetic variant that influences an enzyme that breaks down organophosphates.

CNN: Pesticide exposure in womb may hurt your child's IQ