1. Department of Microbiology and Clinical Immunology, Faculty of Veterinary Medicine University of Warmia and Mazury Olsztyn Poland
2. Department of Epizootiology, Faculty of Veterinary Medicine University of Warmia and Mazury Olsztyn Poland
3. Department of Ichthyology, Hydrobiology and Aquatic Ecology The Stanislaw Inland Fisheries Institute Olsztyn Poland
4. Proteon Pharmaceuticals S.A. Łódź Polska