1. Department of Plant Physiology and Molecular Biology, Faculty of Biology, University of Plovdiv “Paisij Hilendarski”, Plovdiv, Bulgaria
2. Department of Botany and Teaching Methods in Biology, Faculty of Biology, University of Plovdiv “Paisij Hilendarski”, Plovdiv, Bulgaria
3. Department of Pharmacognosy and Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Plovdiv, Plovdiv, Bulgaria