1. Fetal Medicine Research Institute King's College Hospital London UK
2. Medway Maritime Hospital Gillingham UK
3. Institute of Medical Sciences Canterbury Christ Church University Chatham UK
4. Hospital Clínico Universitario Virgen de la Arrixaca Murcia Spain
5. Hospital Universitario San Cecilio Granada Spain
6. Shterev Hospital Sofia Bulgaria
7. Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico Milan Italy
8. Department of Clinical Science and Community Health University of Milan Milan Italy
9. University Women's Hospital Tuebingen Germany
10. Centro Hospitalar Universitário de Lisboa Central Lisbon Portugal