1. Department of Obstetrics and Gynaecology, University Hospital 12 de Octubre, Complutense University of Madrid, Madrid, Spain;
2. Department of Pathology, University Hospital 12 de Octubre, Complutense University of Madrid, Madrid, Spain;
3. Department of Obstetrics and Gynecology, University Hospital 12 de Octubre, Maternal and Child Health and Development Network (Red SAMID-RD12/0026/0016), 12 de Octubre Research Institute (imas12), Complutense University of Madrid, Madrid, Spain