1. Department of Immunology, University Hospital of Wales, Cardiff, UK
2. West Midlands Primary Immunodeficiency Centre, Birmingham Heartlands Hospital, Birmingham, UK
3. Clinical Immunology, John Radcliffe Hospital, Oxford, UK
4. Barts Health NHS Trust, Royal London Hospital, London, UK
5. Frimley Park Hospital, Surrey, UK
6. Royal Liverpool University Hospital, Liverpool, UK
7. Liverpool University Hospital, Liverpool, UK
8. Gartnavel General Hospital, Glasgow, UK
9. Lancashire Teaching Hospitals NHS Foundation Trust, Preston, UK
10. Salford Royal NHS Foundation Trust, Salford, UK
11. Great North Children's Hospital, Royal Victoria Infirmary, Newcastle upon Tyne, UK
12. University of Manchester, Royal Manchester Children's Hospital, Manchester, UK
13. Brighton and Sussex Medical School, University of Sussex, Brighton, UK
14. Central Manchester University Hospitals NHS Foundation Trust, Manchester Royal Infirmary, Manchester, UK
15. Singleton Hospital, Swansea University, Swansea, UK
16. Swansea Centre for Health Economics, Swansea University, Swansea, UK