1. From the Division of Vascular Medicine and Pharmacology, Department of Internal Medicine (K.V., A.H.J.D., A.H.v.d.M.), and Division of Obstetrics and Prenatal Medicine, Department of Obstetrics and Gynecology (W.V., E.A.P.S.), and Department of Clinical Chemistry (H.R.), Erasmus MC, Rotterdam, the Netherlands.