1. Obstetrics, Gynecology and Reproductive Medicine Department; Quirón Dexeus University Hospital; Barcelona Spain
2. Obstetrics Department, Hospital Clínico Lozano Blesa; University of Zaragoza and Instituto de Investigación Sanitaria de Aragón (ISS-Aragón); Zaragoza Spain
3. BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu); IDIBAPS, University of Barcelona and Centre for Biomedical Research on Rare Diseases (CIBER-ER); Barcelona Spain