1. Department of Virology; Croatian National Institute of Public Health; Zagreb Croatia
2. School of Medicine; University of Zagreb; Zagreb Croatia
3. Vrapce University Psychiatric Hospital; Zagreb Croatia
4. Department of Epidemiology; Teaching Institute ‘Dr Andrija Stampar’; Zagreb Croatia
5. School of Medicine; University of Rijeka; Rijeka Croatia
6. Department of Virology; Croatian Veterinary Institute; Zagreb Croatia
7. Department of Microbiology; Istria County Institute of Public Health; Pula Croatia
8. Department of Microbiology and Infectious Diseases with Clinic; Faculty of Veterinary Medicine; University of Zagreb; Zagreb Croatia