1. Department of Pharmacognosy and Pharmaceutical Chemistry, Faculty of Pharmacy; Medical University-Plovdiv; Plovdiv Bulgaria
2. Department of Biochemistry and Microbiology, Faculty of Biology; Plovdiv University “Paisii Hilendarski”; Plovdiv Bulgaria
3. Department of Botany and Teaching Methods in Biology, Faculty of Biology; Plovdiv University “Paisii Hilendarski”; Plovdiv Bulgaria