1. Obstetric Directorate; St Mary's Hospital; Central Manchester University Hospitals NHS Foundation Trust; Manchester UK
2. Institute of Human Development; Manchester Academic Health Science Centre; University of Manchester; Manchester UK
3. Manchester Heart Centre; Manchester Royal Infirmary; Central Manchester University Hospitals NHS Foundation Trust; Manchester UK
4. Institute of Cardiovascular Sciences; Manchester Academic Health Science Centre; University of Manchester; Manchester UK
5. Department of Haematology; Manchester Royal Infirmary; Central Manchester University Hospitals NHS Foundation Trust; Manchester UK
6. Institute of Cancer Sciences; Manchester Academic Health Science Centre; University of Manchester; Manchester UK
7. National Perinatal Epidemiology Unit; University of Oxford; Oxford UK