TY - JOUR AU - Lo, Y M; Corbetta, N; Chamberlain, P F TI - Presence of fetal DNA in maternal plasma and serum JO - Lancet VL - 350 PY - 1997 DO - 10.1016/S0140-6736(97)02174-0 L3 - PubMed-ID: 9274585 SP - 485 EP - 487 N1 - (9076): ER -