1. Department of Obstetrics & Gynaecology; St Michael's Hospital; Bristol UK
2. Department of Obstetrics & Gynaecology; Royal United Hospital; Bath UK
3. Division of Maternal and Child Health Sciences; Ninewells Hospital & Medical School; University of Dundee; Dundee UK
4. Academic Department of Obstetrics & Gynaecology; Coombe Women & Infants University Hospital & Trinity College; University of Dublin; Dublin UK