1. The Kirby InstituteUNSW Sydney Sydney New South Wales Australia
2. School of Health and Life SciencesGlasgow Caledonian University Glasgow UK
3. Health Protection ScotlandNational Services Scotland Glasgow UK
4. British Columbia Centre for Disease Control Vancouver British Columbia Canada
5. School of Population and Public HealthUniversity of British Columbia Vancouver British Columbia Canada
6. Royal Infirmary Edinburgh Edinburgh UK
7. Department of Pathology and Laboratory MedicineUniversity of British Columbia Vancouver British Columbia Canada
8. Department of Health Systems and PopulationsMacquarie University Sydney New South Wales Australia
9. Storr Liver CentreWestmead Institute for Medical ResearchUniversity of Sydney and Westmead Hospital Westmead New South Wales Australia