[1] Univ Complutense Madrid, Fac Dent, ETEP Etiol & Therapy Periodontal Dis Res Grp, Pza Ramon y Cajal S-N, Madrid 28040, Spain
[2] Univ Belgrade, Fac Dent Med, Dept Prevent & Pediat Dent, Belgrade 11000, Serbia
[3] Univ Belgrade, Fac Dent Med, Dept Periodontol & Oral Med, Dr Subotica 8, Belgrade 11000, Serbia
[4] Univ Defense, Inst Med Res, Mil Med Acad, Belgrade 11000, Serbia