Ethinylestradiol and estradiol have different effects on oxidative stress and nitric oxide synthesis in human endothelial cell cultures - Andozia, Mayra Beraldo; Vieira, Carolina Sales; Franceschini, Silvio Antonio; Tolloi, Maria Regina Torqueti; Sá, Marcos Felipe Silva de; Ferriani, Rui Alberto (Fertility and Sterility, 2010)