1 University of Maribor, Faculty of Natural Sciences and Mathematics, Koroška cesta 160, 2000 Maribor, Slovenia; University of Maribor, Faculty of Medicine, Taborska ulica 8, 2000 Maribor, Slovenia.
2 University of Maribor, Faculty of Natural Sciences and Mathematics, Koroška cesta 160, 2000 Maribor, Slovenia; University of Maribor, Faculty of Education, Koroška cesta 160, 2000 Maribor, Slovenia; University of Maribor, Faculty of Energy Technology, Hočevarjev trg 1, 8270 Krško, Slovenia.
3 University of Maribor, Faculty of Natural Sciences and Mathematics, Koroška cesta 160, 2000 Maribor, Slovenia; University of Maribor, Faculty of Medicine, Taborska ulica 8, 2000 Maribor, Slovenia; University of Maribor, Faculty of Education, Koroška cesta 160, 2000 Maribor, Slovenia.
4 University of Maribor, Faculty of Natural Sciences and Mathematics, Koroška cesta 160, 2000 Maribor, Slovenia; University of Maribor, Faculty of Health Sciences, Žitna ulica 15, 2000 Maribor, Slovenia.
5 University of Maribor, Faculty of Natural Sciences and Mathematics, Koroška cesta 160, 2000 Maribor, Slovenia; University of Maribor, Faculty of Medicine, Taborska ulica 8, 2000 Maribor, Slovenia. Electronic address: andrej.dobovisek@um.si.