1. Institute of Social and Preventive Medicine (ISPM) University of Bern Bern Switzerland
2. Department of Drug and Infectious Diseases Epidemiology National Institute for Health Development Tallinn Estonia
3. Institute of Family Medicine and Public Health University of Tartu Tartu Estonia
4. Division of Infectious Diseases Bern University Hospital University of Bern Bern Switzerland
5. Division of Infectious Diseases University Hospital Geneva University of Geneva Geneva Switzerland
6. Division of Infectious Diseases University Hospital Lausanne University of Lausanne Lausanne Switzerland
7. Department of Infectious Diseases and Hospital Hygiene Kantonsspital Aarau Aarau Switzerland
8. Division of Infectious Diseases and Hospital Epidemiology University Hospital Zurich Zurich Switzerland
9. Institute of Medical Virology University of Zurich Zurich Switzerland
10. Division of Infectious Diseases and Hospital Epidemiology Departments of Medicine and Clinical Research University Hospital Basel Basel Switzerland
11. University of Basel Basel Switzerland
12. Department of Infectious Diseases and Hospital Epidemiology Cantonal Hospital St Gallen St Gallen Switzerland
13. Institute of Global Health University of Geneva Geneva Switzerland
14. Centre of Infectious Disease Epidemiology and Research (CIDER) University of Cape Town Cape Town South Africa