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PRENATAL DIAGNOSIS, 19(10), 994-995. 10.1002/(SICI)1097-0223(199910)19:10<994::AID-PD662>3.0.CO;2-H
Bianchi, DW, Simpson, JL, Jackson, LG et al. (1999). Fetal cells in maternal blood: NIFTY clinical trial interim analysis
. PRENATAL DIAGNOSIS, 19(10), 994-995. 10.1002/(SICI)1097-0223(199910)19:10<994::AID-PD662>3.0.CO;2-H