1. Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hospital Universitario Materno-Infantil de Canarias, Las Palmas de Gran Canaria, Spain
2. Research Unit, Hospital Universitario de Gran Canaria Doctor Negrin, Las Palmas de Gran Canaria, Spain
3. Fetal Imaging Unit, FETALMED – Maternal-Fetal Diagnostic Center, Santiago, Chile