1. National AIDS Trust, London, United Kingdom
2. Communicable Diseases Division, Federal Office of Public Health (FOPH), Bern, Switzerland
3. Sigma Research, London School of Hygiene and Tropical Medicine, London, United Kingdom
4. European Centre for Disease Prevention and Control, Stockholm, Sweden
5. Independent Consultant, London, United Kingdom
6. Public Health England, London, United Kingdom
7. Watipa, London, United Kingdom