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Maternal serum inhibin-A and activin-A levels in the first trimester of pregnancies developing pre-eclampsia.
Spencer K, Cowans NJ, Nicolaides KH.
Ultrasound Obstet Gynecol 2008;32:622-6. -
Urine albumin concentration and albumin-to-creatinine ratio at 11(+0) to 13(+6) weeks in the prediction of pre-eclampsia.
Poon LC, Kametas N, Bonino S, Vercellotti E, Nicolaides KH.
BJOG 2008;115:866-73.