1. Faculty of Technology in Leskovac, University of Nis, Bulevar oslobodjenja 124, 16000 Leskovac, Serbia
2. Institute for Oncology and Radiology of Serbia, Pasterova 14, 11000 Belgrade, Serbia
3. Department of Pharmacognosy, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, 11221 Belgrade, Serbia