Effects of the levonorgestrel-releasing intrauterine system on cardiovascular risk markers in patients with endometriosis: a comparative study with the GnRH analogue - Ferreira, Rodrigo Alves; Vieira, Carolina Sales; Rosa e Silva, Júlio César; Rosa e Silva, Ana Carolina Japur de Sá; Nogueira, Antonio Alberto; Ferriani, Rui Alberto (Contraception, 2010)