1. BCNatal ‐ Barcelona Center for Maternal‐Fetal and Neonatal Medicine (Hospital Sant Joan de Deu and Hospital Clínic), IDIBAPS University of Barcelona Barcelona Spain
2. Statistics Department Sant Joan de Déu Foundation Barcelona Spain
3. Programa Concordia Banc de Sang i Teixits Barcelona Spain
4. Institut de Recerca Sant Joan de Déu (IR‐SJD) Barcelona Spain
5. Maternal and Child Health ans Development Network (SAMID) Barakaldo Spain