%0 Journal Article
%T A Comparison between Maternal Serum Free β-Human Chorionic Gonadotrophin and Pregnancy-Associated Plasma Protein A Levels in First-Trimester Twin and Singleton Pregnancies
%A Mashiach, Roy
%A Orr-Urtreger, Avi
%A Yaron, Yuval
%J Fetal Diagnosis and Therapy
%V 19
%N 2
%P 174-177
%@ 1015-3837
%D 2004-04-01
%I S. Karger AG
%~ DeepDyve