目的定量检测各种结缔组织疾病（CTD）患者血清中抗可提取核抗原（ENA）自身抗体滴度，并探索其临床意义。

Objective To study the clinical significance of the quantitative determination of the various anti extracted nuclear antigens(ENA) autoantibodies in the various connective tissue disease (CTD).

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目的进一步探讨抗核包膜蛋白抗体的临床意义。

Objective To further investigate the clinical significance of anti-nuclear envelope protein autoantibodies.

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