1. Department of Periodontology and Oral Medicine, Institute of Dentistry, Banja Luka, Bosnia and Herzegovina
2. Department of Periodontology and Oral Medicine, Medical Faculty, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
3. Department of Periodontology and Oral Medicine, Militar Medical Academy, Belgrade, Serbia
4. Department of Oral Surgery, Medical Faculty, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
5. Department of Periodontology and Oral Medicine, Medical Faculty, University of East Sarajevo, Foca, Bosnia and Herzegovina
6. Department of Periodontology and Oral Medicine, Faculty of Dentistry, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
7. Section of Periodontology, Department of Hard Tissue Engineering, Tokyo Medical and Dental University, Tokyo, Japan