1. Department of Obstetrics and Gynecology; Hospital General de l'Hospitalet; L'Hospitalet del Llobregat Barcelona Catalonia Spain
2. Prenatal Diagnosis Unit, Department of Maternal-Fetal Medicine, ICGON; Hospital Clinic Barcelona, University of Barcelona; Barcelona Catalonia Spain
3. Biomedical Diagnosis Center; Hospital Clinic Barcelona; Barcelona Catalonia Spain