1. Department of Medicine, Merkur University Hospital, Zagreb, Croatia.
2. School of Medicine, University of Zagreb, Zagreb, Croatia.
3. Department of Neuroinfections and Intensive Care Medicine, University Hospital for Infectious Diseases “Dr Fran Mihaljevic”, Zagreb, Croatia.
4. Department of Microbiology and Infectious Diseases with Clinic, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia.
5. Poultry Center, Croatian Veterinary Institute, Zagreb, Croatia.
6. Department of Virology, Croatian Institute of Public Health, Zagreb, Croatia.