1. HIV Unit; Department of Infectious Diseases; Geneva University Hospital; Geneva Switzerland
2. Department of Infectious Diseases; Lausanne University Hospital; Lausanne Switzerland
3. Department of Infectious Diseases; La Chaux de Fonds Hospital; La Chaux de Fonds Switzerland
4. Pharmacology Research Laboratories; Liverpool University; Liverpool UK
5. Department of Infectious Diseases; Bern University Hospital; Bern Switzerland
6. Division of Infectious Diseases & Hospital Epidemiology; University Hospital Zurich; University of Zurich; Zurich Switzerland
7. Department of Infectious Diseases; Basel Hospital; Basel Switzerland
8. Department of Infectious Diseases; St Gallen Hospital; St Gallen Switzerland
9. Division of Laboratory Medicine; Department of Genetics and Laboratory Medicine; Geneva University Hospital; Geneva Switzerland
10. First Clinic of Internal Medicine; Department of Internal Medicine; University of Genoa School of Medicine; Genoa Italy
11. IRCCS Azienda Ospedaliera Universitaria San Martino - IST Instituto Nazionale per la Ricerca sul Cancro; Genoa Italy