1. Academy of Medical Sciences of the Serbian Medical Society, Belgrade, Serbia
2. University Children’s Hospital, Belgrade, Serbia + University of Belgrade, Faculty of Medicine, Belgrade, Serbia
3. University of Belgrade, School of Dental Medicine, Clinic for Pediatric and Preventive Dentistry, Belgrade, Serbia
4. Singidunum University, Faculty of Health, Legal and Business Studies, Valjevo, Serbia
5. Railways of Serbia Institute for Health Care of Workers, Belgrade, Serbia
6. Pediatric Clinic of the Clinical Center Kragujevac, Kragujevac, Serbia + University of Kragujevac, Faculty of Medical Sciences, Kragujevac, Serbia
7. University Children’s Hospital, Belgrade, Serbia