TY - JOUR AU - Lo, Y M; Tein, M S; Lau, T K TI - Quantitative analysis of fetal DNA in maternal plasma and serum: implications for noninvasive prenatal diagnosis JO - Am J Hum Genet VL - 62 PY - 1998 DO - 10.1086/301800 L3 - PubMed-ID: 9529358 SP - 768 EP - 775 ER -