1. Department of Haematology; Guy's and St Thomas' NHS Foundation Trust; London UK
2. Lane Fox Respiratory Unit; St Thomas' Hospital; Guy's and St Thomas' NHS Foundation Trust; London UK
3. Department of Haematology; North Middlesex Hospital; London UK
4. Department of Paediatric Haematology; Bristol Royal Hospital for Children; London UK
5. Department of Haematological Medicine; King's College Hospital; London UK
6. Department of Haematology; Whittington Hospital; London UK