ELIAS, S, SIMPSON, JL, SHULMAN, LP
et al. (1989). TRANS-ABDOMINAL CHORIONIC VILLUS SAMPLING FOR 1ST-TRIMESTER PRENATAL-DIAGNOSIS
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AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY, 160(4), 879-886. 10.1016/0002-9378(89)90304-9
ELIAS, S, SIMPSON, JL, SHULMAN, LP et al. (1989). TRANS-ABDOMINAL CHORIONIC VILLUS SAMPLING FOR 1ST-TRIMESTER PRENATAL-DIAGNOSIS
. AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY, 160(4), 879-886. 10.1016/0002-9378(89)90304-9