High levels of fetal cell-free DNA in maternal serum: A risk factor for spontaneous preterm delivery.
Farina, Antonio MD a,b; LeShane, Erik S. BS b; Romero, Roberto MD c; Gomez, Ricardo MD c; Chaiworapongsa, Tinnakorn MD c; Rizzo, Nicola MD a; Bianchi, Diana W. MD b,*
American Journal of Obstetrics & Gynecology.
193(2):421-425, August 2005.
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