1. Department of Pharmacology Pharmacotherapy and Toxicology Faculty of Pharmacy , Medical University of Sofia , 1000 Sofia
2. Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmacy , Medical University of Sofia 1000 Sofia
3. Department of General and Clinical Pathology, Faculty of Veterinary Medicine , Trakia University , Students Campus, 6000 Stara Zagora , Bulgaria