1. Department of Pharmacology, Animal Physiology, Biochemistry and Chemistry, Faculty of Veterinary Medicine, Trakia University, Student Campus, 6000 Stara Zagora, Bulgaria
2. Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 “Armeyska” St., 6000 Stara Zagora, Bulgaria
3. Department of Electroinduced and Adhesive Properties, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 1040 Sofia, Bulgaria
4. Department of Internal Diseases, Faculty of Veterinary Medicine, Trakia University, Student Campus, 6000 Stara Zagora, Bulgaria