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