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), Institut Clínic of Gynecology, Obstetrics and Neonatology, IDIBAPS, Universitat de Barcelona, CIBER-ER, Barcelona, Spain;
2. Fetal Medicine Unit, Department of Obstetrics and Gynecology Hospital Clínico Universidad de Chile, Santiago, Chile;
3. Pontificia Universidad Javeriana, Seccional Cali, Cali, Colombia