1. Haemostasis Research Unit; Department of Haematology; University College London; London UK
2. Department of Haematology; Newcastle upon Tyne Hospitals NHS Foundation Trust; Newcastle UK
3. Department of Microbiology; Newcastle upon Tyne Hospitals NHS Foundation Trust; Newcastle UK
4. Department of Haematology; University of Newcastle; Newcastle UK
5. Department of Haematology; County Durham and Darlington NHS Foundation Trust; Darlington UK