How do the companies ensure that their genotyping is accurate and their risk predictions are based on solid genetic and epidemiological statistics?

这些公司怎样保证基因分型结果的准确性？又怎样保证风险预测的结果建立在实实在在的遗传和流行病学统计数据上？

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In this case, the statistics suggest Rwanda may have been lucky: the long-term mental-health effects of the war may not be as widespread as they would have been in people with a different genetic mix.

本统计显示卢旺达人也许一直在交好运。战争长期以来对其心理健康造成的影响并没有像混合基因型人群那样广泛。

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But so far the only evidence for a genetic component has been through statistics, the relationship being inferred mathematically from comparisons of twins and other such studies of close relatives.

但迄今为止，遗传基因所占比重的仅有的证据只是一些统计数据，即，从对双胞胎的比较，以及对其他血缘接近者的研究中得出的数学统计关系。

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