1. Maternal Fetal Medicine Unit, Department of Obstetrics Vall d'Hebron Barcelona Hospital Campus, Universitat Autònoma de Barcelona Barcelona Spain
2. Department of Infectous Diseases Vall d'Hebron Barcelona Hospital Campus, Universitat Autònoma de Barcelona Barcelona Spain
3. Department of Microbiology Vall d'Hebron Barcelona Hospital Campus Barcelona Spain
4. Biochemistry Department Vall d'Hebron Barcelona Hospital Campus, Universitat Autònoma de Barcelona Barcelona Spain
5. Maternal‐Fetal Medicine Unit, Department of Obstetrics Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona Badalona Spain
6. Maternal‐Fetal Medicine Unit, Department of Obstetrics Hospital Universitari de Tarragona Joan XXIII, Universitat Rovira i Virgili Tarragona Spain
7. Maternal‐Fetal Medicine Unit, Department of Obstetrics Hospital Universitari Mútua Terrassa, Universitat de Barcelona Terrassa Spain
8. Maternal‐Fetal Medicine Unit, Department of Obstetrics, Consorci Sanitari de Terrassa Universitat Internacional de Catalunya Terrassa Spain
9. Maternal‐Fetal Medicine Unit, Department of Obstetrics Hospital Universitari de Girona Doctor Josep Trueta, Universitat de Girona Girona Spain