1. Health Protection Agency Health Protection Services – Colindale, London, United Kingdom
2. Royal College of General Practitioners Research and Surveillance Centre, Birmingham, United Kingdom
3. Health Protection Scotland, Glasgow, United Kingdom
4. University of Strathclyde, Glasgow, United Kingdom
5. Public Health Wales, Cardiff, United Kingdom
6. Health Protection Agency Microbiology Services – Colindale, London, United Kingdom
7. West of Scotland Specialist Virology Centre, Glasgow, United Kingdom
8. Health Protection Agency Microbiology Services, Cambridge, United Kingdom