1. Department of General Practice, Norwegian Antibiotic Centre for Primary Care, University of Oslo, Oslo, Norway;
2. Department of Microbiology, Førde General Hospital, Førde Health Trust, Førde, Norway;
3. Norwegian National Advisory Unit on Tick-borne Diseases, Sørlandet Hospital, Arendal, Norway;
4. Department of General Practice, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway