[1] Univ Piemonte Orientale, Div Maxillofacial Surg, Corso Mazzini 18, I-28100 Novara, Italy
[2] CHU Nantes, Serv Stomatol & Chirurg Maxillofaciale, Nantes, France
[3] Med Univ, Fac Dent Med, Dept Oral Surg, Plovdiv, Bulgaria
[4] Private Practice Oral Surg, Plovdiv, Bulgaria
[5] Med Univ, Fac Dent Med, Dept Maxillofacial Surg, Plovdiv, Bulgaria
[6] Tartu Univ, Dept Maxillofacial Surg, Stomatol Clin, Tartu, Estonia
[7] Bogomolets Natl Med Univ, Dept Oral & Maxillofacial Surg, Kiev, Ukraine
[8] Univ Hosp Dubrava, Dept Maxillofacial Surg, Zagreb, Croatia
[9] Univ Belgrade, Sch Dent, Clin Maxillofacial Surg, Belgrade, Serbia
[10] Vrije Univ Amsterdam Med Ctr, Dept Oral & Maxillofacial Surg Pathol, Amsterdam, Netherlands
[11] Acad Ctr Dent Amsterdam ACTA, Amsterdam, Netherlands