1. World Health Organization Collaborating Centre for Gonorrhoea and Other Sexually Transmitted Infections, Örebro University Hospital, Örebro, Sweden
2. Department of Genitourinary Medicine, Southampton Medical School, University of Southampton, Southampton
3. Sexually Transmitted Bacteria Reference Laboratory, Health Protection Agency, Colindale, London
4. Birmingham University Hospital, Birmingham
5. Guy's and St Thomas’ NHS Foundation Trust, London, UK