1. Public Health England Health Protection Directorate, Colindale, London, United Kingdom
2. Health Protection Scotland, Glasgow, United Kingdom
3. Royal College of General Practitioners Research and Surveillance Centre, Birmingham, United Kingdom
4. Public Health England Operations Directorate, Microbiology Services, Colindale, London, United Kingdom
5. International Prevention Research Institute, Lyon, France
6. University of Strathclyde, Glasgow, United Kingdom
7. Public Health Wales, Cardiff, United Kingdom
8. Public Health Agency Northern Ireland, Belfast, United Kingdom
9. West of Scotland Specialist Virology Centre, Glasgow, United Kingdom