1. Department of Biomedical, Metabolic and Neural Sciences, International Doctorate School in Clinical and Experimental Medicine University of Modena and Reggio Emilia Modena Italy
2. Unit of Obstetrics and Gynecology, Azienda Unità Sanitaria Locale – IRCCS Reggio Emilia, Modena Italy
3. Gynaecology and Obstetrics Department, Hospital Garcia de Orta Almada Portugal
4. Prenatal Medicine Unit, Obstetrics and Gynecology Unit University “G. d'Annunzio” of Chieti Chieti Italy
5. Department of Obstetrics and Gynecology Ankara University Faculty of Medicine Ankara Turkey
6. Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust University of London London UK
7. Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute St George's University of London London UK
8. Twins Trust Centre for Research and Clinical Excellence St George's Hospital London UK