1. Faculty of Medicine, University of Pristina/Kosovska Mitrovica, Serbia.
2. Faculty of Medicine Foca, University of East Sarajevo, Foca, Republic of Srpska, Bosnia and Herzegovina.
3. Faculty of Veterinarian Medicine, University of Belgrade, Belgrade, Serbia.
4. Military Medical Academy, Belgrade, Serbia.
5. Institute for Health Protection, Krusevac, Serbia.
6. Zrenjanin Hospital, Zrenjanin, Serbia.
7. Institute for Immunology and Virology-Torlak, Belgrade, Serbia.