1. Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf , Hamburg , Germany
2. Departement of Infectious Diseases, Ottawa Hospital Research Institute , Ottawa, Ontario , Canada
3. Department of Noncommunicable Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine , London , United Kingdom
4. Infectiology, Balgrist University Hospital and Faculty of Medicine , Zurich , Switzerland