1. Department of Obstetrics & Gynaecology West Middlesex University Hospital Middlesex UK
2. Imperial College School of Medicine London UK
3. Department of Obstetrics & Gynaecology Chelsea and Westminster Hospital NHS Foundation Trust London UK
4. Department of Obstetrics & Gynaecology Imperial College Healthcare NHS Trust London UK
5. Department of Obstetrics & Gynaecology The Hillingdon Hospitals NHS Foundation Trust Uxbridge UK