1. University clinic for infectious diseases and febrile conditions, Medical Faculty, Ss. Cyril and Methodius University, Skopje, Republic of Macedonia;
2. Public Health Center Skopje, Republic of Macedonia;
3. Institute for Public Health, Skopje, Republic of Macedonia;
4. Faculty of Veterinary Medicine, Ss. Cyril and Methodius University, Skopje, Republic of Macedonia