1. Early Pregnancy & Acute Gynaecology Unit; Queen Charlotte's & Chelsea Hospital, Imperial College; Du Cane Road London W12 0HS UK
2. North Middlesex University Hospital; Sterling Way London N18 1QX UK
3. Queen Charlotte's & Chelsea Hospital, Imperial College; Du Cane Road London W12 0HS
4. Imperial College; London
5. KU Leuven; Belgium