1. Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
2. Department of Clinical Microbiology, Sahlgrenska University Hospital, Gothenburg, Sweden.
3. ENT Department, Capio Lundby Hospital, Gothenburg, Sweden.
4. Department of Laboratory Medicine, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
5. Department of Mathematical Sciences, Chalmers University of Technology, Gothenburg, Sweden.