Yu, CK; Casas, JP; Savvidou, MD; Sahemey, MK; Nicolaides, KH; Hingorani, AD; (2006) Endothelial nitric oxide synthase gene polymorphism (Glu298Asp) and development of pre-eclampsia: a case-control study and a meta-analysis. BMC Pregnancy and Childbirth , 6 , Article 7. 10.1186/1471-2393-6-7. Green open access