Drospirenone and levonorgestrel in combination with either 30 or 20 mcg ethinylestradiol reduce soluble adhesion molecules in Brazilian women: cross-sectional study - Stocco, Bianca; Fumagalli, Helen Figueiredo; Franceschini, Silvio Antonio; Martinez, Edson Zangiacomi; Marzocchi-Machado, Cleni Mara; Toloi, Maria Regina Torqueti (Contraception, 2012)