1. Dept. of Zoology, John Radcliffe Hospital, Oxford University, Oxford
2. Meningococcal Reference Unit, Health Protection Agency, Manchester Medical Microbiology Partnership, Manchester
3. Health Protection Agency Centre for Infections, London
4. Molecular Microbiology Group, School of Medicine, University of Southampton
5. University of Wales, Bangor, Gwynedd
6. National Public Health Service for Wales, Unit 1, Parc Nantgarw, Cardiff
7. Imperial College School of Medicine, London
8. University of Nottingham, Epidemiology and Public Health, Community Health Sciences, Queen's Medical Centre, Nottingham
9. Division of Microbiology, School of Molecular Medical Sciences, Institute of Infection Immunity and Inflammation University of Nottingham
10. Nuffield Dept. of Clinical and Laboratory Sciences, John Radcliffe Hospital, Oxford University, Oxford
11. South West Peninsula Health Protection Unit, Lescaze Offices, Dartington, Devon
12. Derriford Hospital, Crownhill, Plymouth, Devon
13. Div. of Epidemiology and Health Sciences, Medical School, the University of Manchester, Manchester
14. Clinical Science Building, Manchester Royal Infirmary, Manchester
15. Health Protection Scotland, Clifton House, Glasgow, Scotland
16. Health Protection Agency South West, Stonehouse, Gloucester, United Kingdom