[1] Zentrum Rhinol & Allergol, Wiesbaden, Germany
[2] AeDA, Wiesbaden, Germany
[3] Univ Klin Tubingen, Hals Nasen Ohrenklin & Poliklin, Tubingen, Germany
[4] Univ Med Mainz, Med Klin 3, Mainz, Germany
[5] Tech Univ Munich, Klin Hals Nasen & Ohrenheilkunde, Munich, Germany
[6] Univ Med Mainz, Klin Hals Nasen & Ohrenheilkunde, Mainz, Germany
[7] Univ Klinikum Ulm, Klin Hals Nasen & Ohrenheilkunde, Kopf Hals Chirurg, Ulm, Germany
[8] Ruhr Univ Bochum, St Elisabeth Hosp, Klin Hals Nasen & Ohrenheilkunde, Bochum, Germany
[9] Deutsch Gesell Hals Nasen & Ohrenheilkunde Kopf &, Bonn, Germany
[10] Charite Univ Med Berlin, Klin Hals Nasen & Ohrenheilkunde, Berlin, Germany
[11] Univ Med Halle, Klin Hals Nasen Ohren Heilkunde Kopf & Hals Chiru, Halle, Germany
[12] Hals Nasen & Ohrenarzt, Herford, Germany
[13] Arzteverband Deutsch Allergologen, Dreieich, Germany
[14] Klinikum Hannover, Klin Hals Nasen & Ohrenheilkunde, Hannover, Germany
[15] Univ Klinikum Munster, Klin Hals Nasen & Ohrenheilkunde, Munster, Germany
[16] Univ Klinikum Bonn, Klin Hals Nasen & Ohrenheilkunde, Bonn, Germany
[17] CRI Clin Res Int Ltd, Hamburg, Germany
[18] Univ Klinikum Gent, Klin Hals Nasen & Ohrenheilkunde, Ghent, Belgium
[19] Univ Klinikum Frankfurt, Klin Hals Nasen & Ohrenheilkunde, Frankfurt, Germany
[20] Univ Klinikum Leipzig, Klin Hals Nasen & Ohrenheilkunde, Prasident DGHNO, KHC, Leipzig, Germany