1. North West London Hospitals NHS Trust, London, UK
2. Lewisham Healthcare NHS Trust, London, UK
3. Chelsea and Westminster NHS Foundation Trust, London, UK
4. City Health Care Partnership, Hull, UK
5. John Hunter Clinic, Chelsea and Westminster NHS Foundation Trust, London, UK
6. Imperial College Healthcare NHS Trust, London, UK
7. NHS Greater Glasgow and Clyde, Glasgow, UK
8. Clinical Effectiveness Group, British Association for Sexual Health and HIV, London, UK