Conclusion There is no difference in frequency of CYP2A6 gene deletion between lung cancer cases and controls.

结论CYP2A6突变基因在肺癌组及对照组中的频率分布没有差异。

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There was no difference in the polymorphism frequency of PTH gene between the post - and pre menopausal women.

绝经前妇女P TH基因多态性频率较绝经后妇女无差异。

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Results: There was no significant difference in the allelic frequency of the DAT gene polymorphism between sporadic PD patients and unrelated-control subjects.

结果：研究结果指出在帕金森氏病患者和对照者之间的对偶基因频率并没有明显的差异性。

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