1. STD Clinic; Hôpital Saint-Louis AP-HP and Hôpital Saint-Joseph; Paris France
2. Department of Laboratory Medicine, Microbiology, Orebro; WHO Collaborating Center on Gonorrhoea and Other Sexually Transmitted Infections; University Hospital; Orebro Sweden
3. Syphilis National Reference Center; Hôpital Tarnier-Cochin, AP-HP; Paris France
4. 2 Dermatologica Clinic; Carol Davila University; Colentina Clinical Hospital; Bucharest Romania
5. Department of Genitourinary Medicine; The Royal South Hants Hospital; Southampton UK