1. Department of Haematology Blizard Institute Queen Mary University of London and NHS Blood and Transplant London UK
2. Department of Haematology Barts Health NHS Trust London UK
3. Barts Research Centre for Women’s Health Queen Mary University of London UK
4. Department of Statistics and Operational Research Complutense University of Madrid Madrid Spain
5. Department of Statistics and Data Science Complutense University of Madrid Madrid Spain
6. Department of Anaesthesia Barts Health NHS Trust London UK
7. Department of Obstetrics Homerton University Hospital NHS Foundation Trust London UK
8. Department of Preventive Medicine and Public Health University of Granada Granada Spain
9. CIBER (Centro de Investigación Biomédica en Red) of Epidemiology and Public Health (CIBERESP) Madrid Spain