1. HIV & STI Department, Public Health England, Colindale, London, United Kingdom
2. Bacteriology Reference Department, National Infection Service, Public Health England, Colindale, London, United Kingdom
3. NHS Infectious Diseases in Pregnancy Screening Programme, PHE Screening, London, United Kingdom
4. The Northern Integrated Contraception, Sexual Health & HIV Service, Manchester University NHS Foundation Trust, Manchester, United Kingdom
5. Statistics, Modelling and Economics Department, National Infection Service, Public Health England, Colindale, London, United Kingdom
6. NHS Blood & Transplant/PHE Epidemiology Unit, Public Health England, Colindale, London, United Kingdom