[1] Univ Sassari, Dept Med Surg & Pharm, Maxillofacial Surg Operat Unit, Sassari, Italy
[2] Univ Sassari, PhD Sch Biomed Sci, Biomed Sci Dept, Sassari, Italy
[3] Univ Mons UMons, Res Inst Hlth Sci & Technol, Mons Sch Med, Dept Anat & Expt Oncol,UMONS, Mons, Belgium
[4] Elsan Polyclin Poitiers, Dept Otolaryngol Head Neck Surg, Poitiers, France
[5] Federico II Univ Naples, Dept Neurosci Reprod & Odontostomatol Sci, Head & Neck Sect, Naples, Italy
[6] Univ Milan, Maxillofacial Surg Dept, ASSt Santi Paolo & Carlo, Milan, Italy
[7] Univ Milan, Dept Biomed Surg & Dent Sci, Milan, Italy
[8] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Maxillofacial & Dent Unit, Milan, Italy
[9] Univ Hosp Parma, Head & Neck Dept, Maxillo Facial Surg Div, Parma, Italy
[10] Univ Catania, Operat Unit Maxillofacial Surg, Policlin San Marco, Catania, Italy
[11] Univ Siena, Dept Maxillofacial Surg, Siena, Italy
[12] Univ Verona, Dept Maxillofacial Surg, Verona, Italy
[13] Univ Bari Aldo Moro, Maxillo Facial Surg Unit, Bari, Italy
[14] Bellaria & Maggiore Hosp, Maxillofacial Surg Operat Unit, Bologna, Italy
[15] San Camillo Forlanini Hosp, Maxillofacial Surg Unit, Rome, Italy
[16] Univ Cattolica Sacro Cuore, IRCSS A Gemelli Fdn Catholic, Maxillo Facial Surg Unit, Rome, Italy
[17] Univ Hosp Udine, Dept Head & Neck Surg & Neurosci, Clin Maxillofacial Surg, Udine, Italy
[18] S Maria Hosp, Maxillofacial Surg Unit, Terni, Italy
[19] Hosp Univ Donostia, Dept Otorhinolaryngol Head & Neck Surg, San Sebastian, Spain
[20] Univ Trieste, Dept Med Surg & Hlth Sci, Sect Otolaryngol, Trieste, Italy
[21] Univ Sassari, Viale San Pietro 43-B, I-07100 Sassari, Italy