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Prevention of perinatal death and adverse perinatal outcome using low-dose aspirin: a meta-analysis.
Roberge S, Nicolaides KH, Demers S, Villa P, Bujold E.
Ultrasound Obstet Gynecol 2013;41:491-9. -
Cell-free fetal DNA in celomic fluid.
Makrydimas G, Gerovassili A, Sotiriadis A, Kavvadias A, Nicolaides KH.
Ultrasound Obstet Gynecol 2008;32:594-5.