1. STI Outpatient Clinic; Cluster Infectious Diseases, Public Health Service Amsterdam; Amsterdam The Netherlands
2. Department of Dermatology; Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands
3. Centre for Infectious Diseases and Immunology Amsterdam (CINIMA); Amsterdam The Netherlands
4. Centre for Infectious Disease Control; National Institute of Public Health and the Environment; Bilthoven The Netherlands
5. Department of Biomedical Sciences and Human Oncology; Dermatologic Clinic; University of Turin; Turin Italy
6. Department of Dermatology, Venereology, and Allergology; HELIOS St. Elisabeth Hospital; Oberhausen Germany
7. Olafia Clinic; Oslo university Hospital; Institute of Clinical Medicine; University of Oslo; Oslo Norway
8. Department of Genitourinary Medicine; Guy's and St Thomas' NHS Foundation Trust; London UK