1 Specialist Registrar in Immunology, Royal Victoria Infirmary, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.
2 Clinical Scientist at Viapath, Purine Research Laboratory, St Thomas' Hospital, London, United Kingdom.
3 Consultant Immunologist, Royal Victoria Infirmary, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.
4 Consultant Neurologist, Royal Victoria Infirmary, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom.
5 Consultant Immunologist, Royal Victoria Infirmary, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom. suzanne.elcombe@nhs.net.