1. Department of Haematology Whittington Health London UK
2. Department of Haematology University College Hospitals London UK
3. Department of Haematology Manchester Royal Infirmary Manchester UK
4. Department of Paediatric Haematology and Oncology Barts Health NHS Trust London UK
5. Department of Cardiovascular Imaging Barts Heart Centre St Bartholomew's Hospital London UK
6. Institutes for Cardiovascular Science University College London London UK
7. Department of Haematology Birmingham Children's Hospital Birmingham UK
8. Department of Cardiology Chelsea and Westminster Hospital London UK
9. Department of Haematology Sandwell and West Birmingham NHS Trust West Bromwich UK