1. Department of HIV and Sexual Health, Central Middlesex Hospital, London North West University Healthcare NHS Trust, London, United Kingdom
2. Department of HIV, Kiev City AIDS Center, Kiev, Ukraine
3. Department of Biochemistry, University of Dschang, West Region, Cameroon
4. National Microbiology Reference Laboratory, Harare Central Hospital, Harare, Zimbabwe
5. Diagnostics for the Real World, Cambridge, United Kingdom
6. Department of Haematology, University of Cambridge, Cambridge, United Kingdom