1. Pennine Acute NHS Trust; Obstetrics & Gynaecology; Manchester UK
2. Tameside General Hospital; Tameside & Glossop Acute Services NHS Trust; Fountain Street Ashton-Under-Lyme Lancashire UK OL6 9RW
3. Walsgrave Hospital; Department of Obstetrics and Gynaecology; Clifford Bridge Road Coventry UK CV2 2DX
4. University of Birmingham; Department of Public Health and Epidemiology; Public Health Building Birmingham UK B15 2TT