[1] Hosp Clin Porto Alegre, Dept Gynaecol, Porto Alegre, RS, Brazil
[2] Univ Fed Rio Grande Sul Social Med, Porto Alegre, RS, Brazil
[3] Hosp Clin Porto Alegre, Grp Pesquisa & Pos Grad, Porto Alegre, RS, Brazil
[4] Hosp Clin Porto Alegre, Dept Gynaecol, Porto Alegre, RS, Brazil
[5] Klinikum Kempten Oberallgau, Dept Gynaecol, Kempten, Germany
[6] Aristotle Univ Thessaloniki, Dept Gynaecol, Thessaloniki, Greece
[7] Univ Milan, Dept Gynaecol, Milan, Italy