[1] Columbia Univ, Dept Otolaryngol Head & Neck Surg, Irving Med Ctr, 180 Ft Washington Av,Suite 850, New York, NY 10032 USA
[2] Med Univ South Carolina, Dept Otolaryngol Head & Neck Surg, Charleston, SC USA
[3] Guy & St Thomas Hosp, Dept Otolaryngol Head & Neck Surg, London, England
[4] Ghent Univ Hosp, Dept Otorhinolaryngol, Upper Airway Res Lab, Ghent, Belgium
[5] Karolinska Inst, Div ENT Dis, CLINTEC, Stockholm, Sweden
[6] Thomas Jefferson Univ, Dept Otolaryngol Head & Neck Surg, Philadelphia, PA USA
[7] Emory Univ, Dept Otolaryngol Head & Neck Surg, Atlanta, GA USA