1. From the Vascular Laboratory, Department of Therapeutics, Alexandra Hospital (G.A.G., K.S.S., M.L., K.K., M.A., C.P.), Department of Obstetrics and Gynecology, Areteio Hospital (I.L., D.R., M.C., G.C.), and First Department of Propedeutic and Internal Medicine, Laikon Hospital (P.P.S.), Athens University Medical School, Athens, Greece.