Ribeiro Sergio C, Vanni Diana G B S, Tormena Renata A, Pereira Ceci L M, Bitran Alberto, Baracat Edmund C
Department of Gynecology and Obstetrics, Faculty of Medicine, University of São Paulo, São Paulo, Brazil.
Int J Gynaecol Obstet. 2009 Nov;107(2):153-4. doi: 10.1016/j.ijgo.2009.06.012. Epub 2009 Jul 22.