1. Swiss Federal Institute of Technology; ETH Zurich; Zurich Switzerland
2. Maternal Fetal Medicine Department, ICGON; Hospital Clinic Universitat de Barcelona; Barcelona Spain
3. Maternal Fetal Unit, CEDIFETAL; Centro de Diagnostico de Ultrasonido e Imágenes, CEDIUL; Barranquilla Colombia
4. Department of Obstetrics and Gynecology; University Hospital of Zurich; Zurich Switzerland
5. King's College Hospital; London UK
6. KU Leuven; Flanders Belgium