1. Medical Department, Infectious Diseases Division, National Hospital of the Faroe Islands, Tórshavn, Faroe Islands;
2. Department of Infectious Diseases, Odense University Hospital and University of Southern Denmark, Odense, Denmark;
3. Department of Infectious Diseases, Landspitali University Hospital, Reykjavík, Iceland;
4. Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavík, Iceland;
5. Clinic of Oncology, Clinical Centre, Nis, Serbia;
6. Centre of Health Research and Department of Science and Technology, University of the Faroe Islands, Tórshavn, Faroe Islands