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机译:Choice of second-trimester genetic sonogram for detection of trisomy 21.
Department of Obstetrics, Gynecology and Reproductive Sciences, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School/St. Peter's Medical Center, New Brunswick, USA. vintziam@umdnj.edu;
Down Syndrome; Fetal Diseases; Ultrasonography; Prenatal; 唐氏综合征; 胎儿疾病; 超声检查; 产前;