1. Department of Infectious Diseases, Region Västra Götaland, South Älvsborg Hospital, Borås, Sweden;
2. Department of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;
3. Department of Clinical Microbiology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden;
4. Department of Surgery, Region Västra Götaland, South Älvsborg Hospital, Borås, Sweden;
5. Department of Surgery, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;
6. Department of Infectious Diseases, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden;
7. Department of Infectious Diseases, Region Västra Götaland, Skaraborg Hospital, Skövde, Sweden;
8. Department of Surgery, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden