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Tan, Min Yi; Syngelaki, Argyro; Poon, Liona C.; Rolnik, Daniel L.; O’Gorman, Neil; Delgado, Juan Luis; Akolekar, Ranjit; Konstantinidou, Liountmila; Tsavdaridou, Maria; Galeva, Slavyana; Ajdacka, Ursula; Molina, Francisca S.; Persico, Nicola; Jani, Jacques C.; Plasencia, Walter; Greco, Elena; Papaioannou, George; Wright, Alan; Wright, David; Nicolaides, Kypros H. . (2018). Screening for pre-eclampsia by maternal factors and biomarkers at 11-13 weeks’ gestation. Ultrasound in Obstetrics & Gynecology, (), –. doi:10.1002/uog.19112 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research