1. Clinical Pharmacology Department, Clinical Centre Kragujevac, Kragujevac, Serbia
2. Faculty of Medical Science, University of Kragujevac, Kragujevac, Serbia
3. Department of Hospital Infections Control, Clinical Centre Kragujevac, Kragujevac, Serbia
4. Pediatric Clinic, Clinical Centre Kragujevac, Kragujevac, Serbia
5. Centre for Oncology and Radiology, Clinical Centre Kragujevac, Kragujevac, Serbia