所有同期组群资料都受到可能发生的选择作用的影响。

All cohort data are affected by possible selection effects.

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华盛顿大学医学中心将以前用于评估VKORC1变量与抗凝结果关系的同期组群患者样本编入索引。

The University of Washington Medical Center index patient sample consisted of a cohort used previously to assess the association between VKORC1 variants and anticoagulation-related outcomes.

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