1. Fetal i+D Fetal Medicine Research Center, BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), IDIBAPS; University of Barcelona; Barcelona, Spain
2. Fetal Medicine Unit, Clínica Dávila; Santiago Chile
3. Center for Biomedical Research on Rare Diseases (CIBER-ER), Madrid; Spain