1. Clinical Centre Kragujevac, Pediatric Clinic, Kragujevac
2. Clinical Centre Kragujevac, Department of Clinical Pharmacology, Kragujevac + Faculty of Medical Sciences, Kragujevac
3. Clinical Centre Kragujevac, Pediatric Clinic, Kragujevac + Faculty of Medical Sciences, Kragujevac
4. Faculty of Medical Sciences, Kragujevac + Clinical Centre Kragujevac, Department of Laboratory Diagnostics, Kragujevac