Aneurin Bevan University Health Board, Government of the United Kingdom - University Hospitals of North Midlands, Imperial College London, University of East London, Government of the United Kingdom - Royal Brompton and Harefield NHS Foundation Trust, Imperial College London, University of Birmingham - Institute of Cardiovascular Sciences, NHS Foundation Trust - Department of Haematology, Aberdeen Royal Infirmary, Buckinghamshire Healthcare NHS Trust, County Durham and Darlington, Cwm Taf Morgannwg University Health Board, Newcastle Upon Tyne Hospitals NHS Foundation Trust, North Cumbria Integrated Care NHS Foundation Trust, University Hospital of North Tees, Government of the United Kingdom - Royal Free London NHS Foundation Trust, Royal Liverpool University Hospital, Bart's Health NHS Trust - The Royal London Hospital, Government of the United Kingdom - Sheffield Teaching Hospitals, South Tees Hospitals NHS Foundation Trust, University Hospitals Birmingham NHS Foundation Trust, Government of the United Kingdom, Department of Health, National Health Service (NHS), University Hospitals Plymouth, NHS Foundation Trust - Whittington Health, Northumbria Healthcare NHS Foundation Trust, Hampshire Hospitals NHS Foundation Trust, University of Oxford - Oxford University Hospitals, Cardiff and Vale University Health Board, Imperial College London, Government of the United Kingdom - Sheffield Teaching Hospitals and Imperial College London - Department of Haematology