O'Gorman, N., Wright, D., Poon, L. C., Rolnik, D. L., Syngelaki, A., de Alvarado, M., Carbone, I. F., Dutemeyer, V., Fiolna, M., Frick, A., Karagiotis, N., Mastrodima, S., de Paco Matallana, C., Papaioannou, G., Pazos, A., Plasencia, W., & Nicolaides, K. H. (2017). multicenter screening for pre‐eclampsia by maternal factors and biomarkers at 11–13 weeks' gestation: comparison with NICE guidelines and ACOG recommendations. Ultrasound in obstetrics & gynecology, 49, 756–760. http://access.bl.uk/ark:/81055/vdc_100046625207.0x000047