1. Department of Obstetrics & Gynaecology; St George's University Hospital NHS Foundation Trust; London UK
2. Academic Department of Obstetrics and Gynaecology; Chelsea and Westminster Hospital; London UK
3. Department of Obstetrics and Gynecology and Reproductive Sciences; University of California; San Francisco CA USA
4. Service de Gynécologie-Obstétrique; Centre Hospitalier Princesse Grace; Monaco
5. Hôpital Joseph-Ducuing; Toulouse France
6. Department of Obstetrics and Gynaecology; Institute for Maternal and Child Health; IRCCS- Burlo Garofolo; Trieste Italy