1. Maternal-Fetal Medicine, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Spain;
2. Physical Medicine and Rehabilitation, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Spain;
3. Institut de Diagnòstic per la Imatge, Barcelona, Spain;
4. Pediatric Surgery, Hospital Universitari Vall d’Hebron. Universitat Autònoma de Barcelona, Spain;
5. Department of Obstetrics and Gynecology, Baylor College of Medicine and Texas Children's Fetal Center, Houston, TX, USA