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. Jovan Markovic, 'Stomatoloski fakultet Univerzitet u Beogradu, Serbia
6. Nemanja Marinkovic, Stomatoloski fakultet u Beogradu, Serbia