1. University Hospital for Infectious Diseases “Dr. Fran Mihaljević,” Research Department, Zagreb, Croatia.
2. Faculty of Veterinary Medicine, University of Zagreb, Department of Microbiology and Infectious Diseases with Clinic, Zagreb, Croatia.
3. Institute of Microbiology & Immunology, Faculty of Medicine, Department of Virology, Ljubljana, Slovenia.
4. Faculty of Forestry, University of Zagreb, Zagreb, Croatia.
5. Croatian Veterinary Institute, Zagreb, Croatia.
6. Finnish Forest Research Institute, Vantaa, Finland.
7. Medical Faculty, University of Rijeka, Rijeka, Croatia.