title: Quantification of circulating DNA: in the preparation lies the rub.
authors.forename: S
authors.initials: S
authors.lastname: Hahn
authors.forename: X Y
authors.initials: XY
authors.lastname: Zhong
authors.forename: W
authors.initials: W
authors.lastname: Holzgreve
mesh_terms: D001800:Blood Specimen Collection / Q000379:methods*; D004247:DNA / Q000097:blood*; D005260:Female; D005312:Fetal Blood / Q000737:chemistry*; D006801:Humans; D011247:Pregnancy / Q000097:blood*
chemical_list: D004247:DNA