1. Department of Haematology; UCLH; London
2. Department of Haematology; King's College and Guys &St Thomas' NHS Trust; London
3. Department of Haematology; NBSBT and Oxford University Hospitals (OUH) Trust; UK
4. Department of Haematology; GOSH; London
5. Department of Haematology; University Hospitals Coventry &Warwickshire NHS trust; Coventry; UK
6. Department of Haematology; IRCCS Maggiore Hospital Ca' Granda Foundation; University of Milan; Milan; Italy
7. Department of Haematology; Queen Elizabeth Hospital; SLHT; London
8. Department of Haematology; UCL; London; UK