1. Department of Chemistry, Biochemistry and Environmental Protection; Faculty of Sciences, University of Novi Sad; Trg Dositeja Obradovica 3 21000 Novi Sad Vojvodina Serbia
2. Department of Biology and Ecology; Faculty of Sciences, University of Novi Sad; Trg Dositeja Obradovica 2 21000 Novi Sad Vojvodina Serbia
3. Tumorimmunology and Pharmacology Research Group; Institute of Biochemistry, Biological Research Centre; Temesvari krt. 62 H-6726 Szeged Hungary
4. Faculty of Dentistry; University of Szeged; Tisza Lajos krt. 64. H-6720 Szeged Hungary