[1] Univ Udine, Dept Otolaryngol Head & Neck Surg, Policlin Univ, IT-33100 Udine, Italy
[2] Kings Coll London Hosp, Dept Maxillofacial Surg, London, England
[3] Wilford Hall USAF Med Ctr, Dept Otolaryngol Head & Neck Surg, Lackland AFB, TX 78236 USA
[4] Ehime Univ, Sch Med, Dept Oral & Maxillofacial Surg, Matsuyama, Ehime 790, Japan