[1] Int Federat Otorhinolaryngol Soc YO IFOS, Rhinol Study Grp, Donostia San Sebastian, Spain
[2] Hosp Complex Santiago de Compostela, Serv Otolaryngol, Travesia de Choupana S-N, Santiago De Compostela, Spain
[3] Stanford Univ, Med Ctr, Dept Otolaryngol Sleep Surg Div, Stanford, CA 94305 USA
[4] Hosp Nuestra Senora Salud, Dept Otolaryngol, San Luis Potosi, Mexico
[5] Hosp USP Marbella, Dept Otolaryngol, Malaga, Spain
[6] Univ Libre Bruxelles, Dept Otolaryngol Head & Neck Surg, CHU St Pierre, Brussels, Belgium
[7] Univ Santiago de Compostela, Dept Otolaryngol, Santiago De Compostela, Spain