1. Division of Infectious Diseases and Infection Control, Cantonal Hospital St. Gallen, Switzerland
2. labormedizinisches zentrum Dr Risch AG, Buchs, Switzerland
3. Gynaecological consultation, Walk-in Clinic Kanonengasse, Städtische Gesundheitsdienste Zurich, Switzerland
4. Ladycheck, Aids-Hilfe beider Basel, Switzerland / Department of Infectious Diseases, Bern University Hospital, University of Bern, Switzerland
5. Department of Infectious Diseases, Bern University Hospital, University of Bern, Switzerland
6. PROFA – Consultations in Sexual Health, Renens, Switzerland
7. Ladycheck, Aids-Hilfe beider Basel, Switzerland
8. Division of Infectious Diseases and Infection Control, Cantonal Hospital St. Gallen, Switzerland / Communicable Diseases Division, Swiss Federal Office of Public Health, Bern, Switzerland