1. Department of Haematology; Imperial College Healthcare NHS Trust, St Mary's Hospital; London W2 1NY United Kingdom
2. Department of Haematology; Imperial College Healthcare NHS Trust, Hammersmith Hospital; London W12 0HS United Kingdom
3. Department of Histopathology; Imperial College Healthcare NHS Trust, Hammersmith Hospital; London W12 0HS United Kingdom
4. Centre for Haematology; Faculty of Medicine, St Mary's Hospital Campus of Imperial College, St Mary's Hospital; London W2 1NY United Kingdom