[1] Klinikum Bielefeld, Dept Otorhinolaryngol Head & Neck Surg, Teutoburger St 50, D-33604 Bielefeld, Germany
[2] Radiol & Neuroradiol Glattzentrum, Wallisellen, Switzerland
[3] GZA Hosp Antwerp, Dept Radiol, Antwerp, Belgium
[4] Kansai Rosai Hosp, Dept Otolaryngol & Head & Neck Surg, Amagasaki, Hyogo, Japan
[5] Univ Chicago Med & Biol Sci, Sect Otolaryngol Head & Neck Surg, Chicago, IL USA
[6] Canterbury Dist Hlth Board, Dept Otolaryngol, Christchurch, New Zealand
[7] Clin Univ Navarra, Dept Otolaryngol, Navarra, Spain
[8] Tempere Univ, Tampere, Finland
[9] Nagoya Univ, Dept Otolaryngol, Nagoya, Aichi, Japan
[10] Shinshu Univ, Dept Otorhinolaryngol, Sch Med, Matsumoto, Nagano, Japan
[11] Fudan Univ, Eye Ear Nose & Throat Hosp, Shanghai, Peoples R China
[12] Second Mil Med Univ, Dept Otolaryngol, Shanghai Hosp, Shanghai, Peoples R China
[13] Nagoya Univ, Dept Radiol, Nagoya, Aichi, Japan