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Free beta-hCG as first-trimester marker for fetal trisomy.

作者信息

Spencer K, Macri J N, Aitken D A, Connor J M

出版信息

Lancet. 1992 Jun 13;339(8807):1480. doi: 10.1016/0140-6736(92)92073-o.

DOI:10.1016/0140-6736(92)92073-o
PMID:1376387
Abstract
摘要

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