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First-trimester markers of aneuploidy in women positive for HIV.
Savvidou M, Samuel I, Syngelaki A, Poulton M, Nicolaides K.
BJOG 2011;118:844-8. -
Maternal serum placental protein 13 at eleven to thirteen weeks in chromosomally abnormal pregnancies.
Akolekar R, Pérez Penco JM, Skyfta E, Rodríguez Calvo J, Nicolaides KH.
Fetal Diagn Ther 2010;27:72-7.