1. Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University, Sofia, Bulgaria
2. Bulgarian Academy of Sciences, Institute of Polymers, Sofia, Bulgaria
3. Department of Forensic Medicine and Deontology, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
4. Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, Medical University of Sofia, Sofia, Bulgaria