1 BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu, University of Barcelona), Barcelona, Spain. xpburgos@clinic.cat.
3 BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu, University of Barcelona), Barcelona, Spain.
4 Transmural Biotech S.L., Barcelona, Spain.
5 Institut D'Investigacions Biomediques August Pi i Sunyer, IDIBAPS, Barcelona, Spain.
6 Center for Biomedical Research on Rare Diseases (CIBER-ER), Madrid, Spain.