1. University of Sao Paulo; Department of Obstetrics and Gynecology, Medical School of Ribeirao Preto; Hospital das Clínicas da FMRP-USP, 8 andar, Campus Universitário Campus Universitario da USP Ribeirao Preto Sao Paulo Brazil 14048-900
2. University of Nottingham; Division of Obstetrics and Gynaecology, School of Clinical Sciences; D Floor, East Block, Queens Medical Centre Nottingham UK NG27SE