1. Thetis, Food and Environmental Laboratory, Tórshavn, Faroe Islands.
2. Medical Faculty, University of Iceland, Reykjavík, Iceland.
3. Faculty of Science and Technology, University of the Faroe Islands, Tórshavn, Faroe Islands.
4. Department of Internal Medicine and Research Unit of the Medical Department, National Hospital of the Faroe Islands, Queen Alexandrines Teaching Hospital, Tórshavn, Faroe Islands.
5. Department of Infectious Diseases, Odense University Hospital and University of Southern Denmark, Odense, Denmark.
6. Department of Clinical Microbiology, Landspitali University Hospital, Reykjavík, Iceland.