[1] Weill Cornell Med, Dept Otolaryngol Head & Neck Surg, 2315 Broadway, New York, NY 10024 USA
[2] Univ Pittsburgh, Sch Med, Dept Otolaryngol, 200 Lothrop St, Pittsburgh, PA 15213 USA
[3] Paracelsus Med Univ, Dept Otorhinolaryngol Head & Neck Surg, Mullner Hauptstr 48, A-5020 Salzburg, Austria