1. Ss. Cyril and Methodius University, Faculty of Agricultural Sciences and Food, Skopje, North Macedonia
2. University of Belgrade, Faculty of Agriculture, Department of Animal Science, Zemun- Belgrade, Serbia
3. University of Novi Sad, Faculty of Agriculture, Department of Veterinary Medicine, Novi Sad, Serbia
4. College of Agriculture and Food Technology, Prokuplje, Serbia
5. University of Belgrade, Faculty of Veterinary Medicine, Department of Ruminant and Swine Diseases, Belgrade, Serbia