Author(s):
1. Zorana Stamenković, Clinic of Orthodontics, School of Dentistry, University of Belgrade, Serbia
2. Nenad Nedeljković, Clinic of Orthodontics, School of Dentistry, University of Belgrade, Serbia
3. Vladan Mirjanić, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
4. Vanja Stojić, Serbia
5. Nemanja Marinkovic, Stomatoloski fakultet u Beogradu, Serbia
6. Ivan Arsic, Stomatoloski fakultet u Beogradu, Serbia