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Sofiya Ivanova
Non-infectious Diseases Unit, National Diagnostic and Research Veterinary Medical Institute,
Sofia, Bulgaria
Dimitrichka Dimitrova
Department of Internal Non-infectious Diseases, Pathology and Pharmacology,
Faculty of Veterinary Medicine of the University of ForestrySofia, Bulgaria
Metodi Petrichev
Non-infectious Diseases Unit, National Diagnostic and Research Veterinary Medical Institute,
Sofia, Bulgaria