Effect of the oral contraceptives containing different progestagens and ethinylestradiol on the hemolytic activity of the complement system - Migueleti, Suellen Priscila dos Santos; Bertozi, Renata Ignácio; Azzolini, Ana Elisa Caleiro Seixas; Lucisano-Valim, Yara Maria; Toloi, Maria Regina Torqueti; Marzocchi-Machado, Cleni Mara (Meeting of the Brazilian Society for Immunology, 2008)