1 Department of Microbiology, Oslo University Hospital, Oslo, Norway; Department of Infection Control and Preparedness, Norwegian Institute of Public Health, Oslo, Norway.
2 Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.
3 Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway; Department of Medical Microbiology, Stavanger University Hospital, Stavanger, Norway.
4 Big Data Institute, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom; NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom; NIHR Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance at the University of Oxford, Oxford, United Kingdom.
5 Department of Microbiology, Oslo University Hospital, Oslo, Norway. Electronic address: joerbj@ous-hf.no.