1. Virgen de la Arrixaca University Clinic Hospital, Dept. of Obstetrics and Gynecology, Murcia, Spain
2. Universidad Católica de Murcia (UCAM), Murcia, Spain
3. Santa Lucía University Hospital, Dept. of Obstetrics and Gynecology, Cartagena, Spain
4. Santa Lucía University Hospital, Dept. of Pathology, Cartagena, Spain