1. Department of Hygiene, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 3, 21000 Novi Sad, Serbia
2. Center for Hygiene and Human Ecology, Institute of Public Health of Vojvodina, Futoška 121, 21000 Novi Sad, Serbia
3. Department of Microbiology, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 3, 21000 Novi Sad, Serbia
4. Center for Microbiology, Institute of Public Health of Vojvodina, Futoška 121, 21000 Novi Sad, Serbia
5. Faculty of Pharmacy Novi Sad, University of Business Academy, Trg Mladenaca 5, 21000 Novi Sad, Serbia