1. Department of Microbiology, Vestfold Hospital Trust, Tønsberg, Norway
2. Department of Medical Biochemistry, Telemark Hospital Trust, Skien, Norway
3. Center for Virology, Medical University of Vienna, Vienna, Austria
4. Department of Virology, Division for Infection Control and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
5. Department of Natural Sciences and Environmental Health, Faculty of Technology, Natural Sciences and Maritime Sciences, University of South-eastern Norway, Bø, Norway
6. The Antibiotic Centre of Primary Care, Department of General Practice, Institute of Health and Society, University of Oslo, Oslo, Norway