1. Zoonosis Science Center, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
2. Section for Infectious Diseases, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
3. Department of Chemistry, Umeå University, Umeå, Sweden
4. Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden
5. University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Vodnany, Czech Republic
6. Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Faculty of Health and Life Sciences, Linnaeus University, Kalmar, Sweden
7. Present address: WHO Collaborating Centre for Reference and Research on Influenza, The Peter Doherty Institute for Infection and Immunity, Melbourne, Australia.