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Second-trimester levels of pregnancy-associated plasma protein-A and free beta-hCG in pregnancies with trisomy 13.
Spencer K, Crossley JA, Aitken DA, Nicolaides KH.
Prenat Diagn 2005;25:358-61. -
Outcome of antenatally diagnosed talipes equinovarus in an unselected obstetric population.
Bakalis S, Sairam S, Homfray T, Harrington K, Nicolaides K, Thilaganathan B.
Ultrasound Obstet Gynecol 2002;20:226-9.