1. Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich
2. Institute of Integrative Biology, ETH Zurich
3. Laboratory of Virology, University Hospital Geneva and University of Geneva Medical School
4. Swiss National Center for Retroviruses, University of Zurich
5. Division of Immunology
6. Institute for Medical Microbiology, University of Basel
7. Division of Infectious Diseases, University Hospital Geneva
8. Division of Infectious Diseases, University Hospital Lausanne
9. Clinic for Infectious Diseases, Bern University Hospital and University of Bern
10. Division of Infectious Diseases and Hospital Epidemiology, University Hospital Basel
11. Division of Infectious Diseases, Cantonal Hospital St. Gallen
12. Division of Infectious Diseases, Regional Hospital Lugano, Switzerland