[1] Univ Udine, Sch Med, Piazzale S Maria della Misericordia, I-33100 Udine, Italy
[2] Johns Hopkins Med Inst, Dept Pathol, Baltimore, MD 21205 USA
[3] Johns Hopkins Med Inst, Dept Otolaryngol Head & Neck Surg, Baltimore, MD 21205 USA
[4] Univ Arkansas Med Sci, Dept Pathol, Little Rock, AR 72205 USA
[5] Univ Hosp KU Leuven, Otorhinolaryngol Head & Neck Surg, Leuven, Belgium
[6] Univ Hosp KU Leuven, Sect Head & Neck Oncol, Dept Oncol, Leuven, Belgium
[7] Univ Texas MD Anderson Canc Ctr, Dept Pathol, Houston, TX 77030 USA
[8] Univ Liverpool, Sch Dent, Oral Pathol, Liverpool L69 3BX, Merseyside, England
[9] Allegiance Hlth, Dept Pathol, Jackson, MI USA
[10] CBLPath, Head & Neck Pathol, Warwick, RI USA
[11] Shizuoka Canc Ctr Hosp & Res Inst, Div Pathol, Shizuoka, Japan
[12] Univ Groningen, Univ Med Ctr Groningen, Dept Otorhinolaryngol Head & Neck Surg, Groningen, Netherlands
[13] Radboud Univ Nijmegen, Med Ctr, Dept Otolaryngol Head & Neck Surg, NL-6525 ED Nijmegen, Netherlands
[14] Woodland Hills Med Ctr, Dept Pathol, Woodland Hills, CA USA