1. Harris Birthright Research Centre for Fetal Medicine King's College Hospital London UK
2. Department of Obstetrics and Gynecology, Institute of Clinical Sciences Lund Lund University Lund Sweden
3. GKT School of Medical Education King's College London London UK
4. Department of Obstetrics and Gynecology Hospital Universitario de Torrejón, Torrejón de Ardoz Madrid Spain
5. School of Medicine Universidad Francisco de Vitoria (UFV), Pozuelo de Alarcón Madrid Spain
6. Biostatistics and Epidemiology Platform Instituto de Investigación Sanitaria del Principado de Asturias Oviedo Asturias Spain
7. Fetal Medicine Unit Medway Maritime Hospital Gillingham UK
8. Institute of Medical Sciences Canterbury Christ Church University Chatham UK