经阴道彩色多普勒超声诊断11~14孕周胎儿心脏结构异常的价值
경음도채색다보륵초성진단11~14잉주태인심장결구이상적개치
The Value of Transvaginal Color Doppler Sonography in the Diagnosis of Fetal Cardiac Defects between 11th and 14th Gestational Weeks
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