1. Department of Immunology, University Hospital of Wales, Cardiff, UK
2. Department of Clinical Immunology, Derriford Hospital, Plymouth, UK
3. Department of Immunology and Immunogenetics, Southmead Hospital, Bristol, UK
4. Department of Clinical Immunology and Allergy, The Royal Surrey County Hospital, Guildford, UK
5. Department of Clinical Immunology and Allergy, St Helier Hospital, Carshalton, UK