1. Department of Microbiology and Infection Control, Division for Diagnostics and Technology, Akershus University Hospital, Lørenskog, Norway
2. Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, United Kingdom
3. Department of Infectious Diseases, Division of Medicine, Akershus University Hospital, Lørenskog, Norway
4. Institute for Clinical Medicine, University of Oslo, Norway
5. Department for Emergency Medicine, Division for Internal Medicine, Akershus University Hospital, Lørenskog, Norway