1. Department of Pediatric and Preventive Dentistry, Medical Faculty, University of Banja Luka, 78 000 Banja Luka, Bosnia and Herzegovina
2. Public Health Center Kneževo, 78 230 Kneževo, Bosnia and Herzegovina
3. Public Health Center Čelinac, 78 240 Čelinac, Bosnia and Herzegovina
4. Public Health Center Doboj, 74 000 Doboj, Bosnia and Herzegovina
5. Public Health Center Banja Luka, 78 000 Banja Luka, Bosnia and Herzegovina
6. Department of Restorative Dentistry and Endodontics, Medical Faculty, University of Banja Luka, 78 000 Banja Luka, Bosnia and Herzegovina
7. Institute of Dentistry, 78 000 Banja Luka, Bosnia and Herzegovina