1. Clinical Immunology Service University of Birmingham Birmingham UK
2. Myeloma UK Edinburgh UK
3. UK NEQAS Immunology, Immunochemistry & Allergy Sheffield Teaching Hospitals Sheffield UK
4. Cancer Research UK Clinical Trials Unit University of Birmingham Birmingham UK
5. Protein Reference Unit, South West London Pathology St Georges Hospital London UK
6. Oxford University Hospitals NHS Foundation Trust Oxford UK
7. North Devon District Hospital Barnstaple UK
8. St George's Hospital London UK