1. Department of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
2. Department of Infectious Diseases, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
3. Department of Clinical Microbiology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
4. Department of Mathematical Sciences, Chalmers University of Technology, Gothenburg, Sweden
5. Department of Pathology and Genetics, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
6. Department of Infectious Diseases, Odense University Hospital, Odense, Denmark
7. Institute of Clinical Research, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
8. Department of Gastroenterology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
9. Department of Clinical Science, University of Bergen, Bergen, Norway