1. Department of Cardiology, Copenhagen University Hospital-Rigshospitalet, 2100 Copenhagen, Denmark
2. Department of Infectious Diseases, Odense University Hospital, 5000 Odense, Denmark
3. Department of Medicine, Infectious Diseases Division, National Hospital of the Faroe Islands, JC. Svabosgøta 41-49, 100 Torshavn, Faroe Islands
4. Clinic of Oncology, Clinical Centre, 18000 Nis, Serbia
5. Department of Medical Statistics and Informatics, School of Medicine, University of Nis, 18108 Nis, Serbia
6. Department of Infectious Diseases, Landspitali University Hospital, 105 Reykjavik, Iceland
7. Faculty of Medicine, School of Health Sciences, University of Iceland, 101 Reykjavik, Iceland
8. Faculty of Health Sciences, University of the Faroe Islands, 100 Torshavn, Faroe Islands