Institution: | 1. Fetal Medicine Unit, Department of Obstetrics and Gynaecology, Hospital Universitario “12 de Octubre”, Madrid, Spain;2. Department of Obstetrics and Gynaecology, Hospital Clínico Universitario, Salamanca, Spain;3. Pediatric Heart Institute, Department of Pediatrics, Hospital Universitario “12 de Octubre”, Madrid, Spain |