Affiliation: | 1. Women's Health Research Unit, Barts and the London Medical School, Queen Mary University of London, London, UK;2. Department of Obstetrics and Gynaecology, Barts NHS Trust, London, UK;3. Barts and the London Medical School, Queen Mary University of London, London, UK;4. School of Health Sciences, City University, London, UK;5. Department of Haematology, Barts NHS Trust, London, UK;6. NHS Blood and Transplant, London, UK |