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Endothelial nitric oxide synthase gene polymorphism and maternal vascular adaptation to pregnancy.
Savvidou MD, Vallance PJ, Nicolaides KH, Hingorani AD.
Hypertension 2001;38:1289-93. -
First-trimester screening for trisomy 21 in singleton pregnancies achieved by assisted reproduction.
Liao AW, Heath V, Kametas N, Spencer K, Nicolaides KH.
Hum Reprod 2001;16:1501-4.