[1] Univ Michigan, Sch Dent, Dept Periodont & Oral Med, Ann Arbor, MI 48109 USA
[2] Univ Naples Federico II, Dept Neurosci Reprod Sci & Dent, Naples 80131, Italy
[3] Univ Bern, Dept Periodontol, CH-3012 Bern, Switzerland
[4] Univ Bologna, Dept Biomed & Neuromotor Sci, Bologna 40125, Italy
[5] Univ Milan, Dept Biomed Surg & Dent Sci, Milan 20122, Italy
[6] Univ Vita Salute San Raffaele, Milan 20132, Italy
[7] U Pittsburgh, USC, LSU, U Miami, Ft Lauderdale, FL 33314 USA
[8] Nova Southeastern, Ft Lauderdale, FL 33314 USA
[9] Univ Agadir Univ, Dept Biomat Res, Agadir 80000, Morocco
[10] Univ Monastir, Dept Anat, Monastir 5000, Tunisia
[11] Lebanese Univ, Dept Periodontol, Hadeth 40016, Lebanon
[12] Albanian Univ, Fac Med Sci, Tirana 1001, Albania
[13] Univ Campania Luigi Vanvitelli, Multidisciplinary Dept Med Surg & Dent Specialtie, Naples 80138, Italy
[14] Dept Head & Neck Surg, Istanbul 26480, Turkey
[15] Univ Ferrara, Dept Biomed & Special Surg Sci, Ferrara 44121, Italy
[16] London Sch Dent & Hosp, London E1 2AD, England
[17] IM Sechenov First Moscow State Med Univ, Inst Dent, Moscow 119146, Russia
[18] Magna Graecia Univ Catanzaro, Dept Hlth Sci, Catanzaro 88100, Italy
[19] Univ Michigan, Sch Dent, Dept Periodont & Oral Med, Ann Arbor, MI 48109 USA