新生21号染色体部分重复致胎儿唐氏综合征的产前诊断一例并文献复习
신생21호염색체부분중복치태인당씨종합정적산전진단일례병문헌복습
Prenatal diagnosis of a de novo partial duplication of chromosome 21 associated with Down syndrome:a case report and literature review
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