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Maternal age and adverse pregnancy outcomes: a cohort study.
Khalil A, Syngelaki A, Maiz N, Zinevich Y, Nicolaides KH.
Ultrasound Obstet Gynecol 2013;42:634-43. pdf -
Maternal serum retinol-binding protein-4 at 11-13weeks' gestation in normal and pathological pregnancies.
Nanda S, Nikoletakis G, Markova D, Poon LC, Nicolaides KH.
Metabolism 2013;62:814-9.