[1] Amsterdam Univ Med Ctr, Dept Otorhinolaryngol, Locat AMC Amsterdam, Amsterdam, Netherlands
[2] European Forum Res & Educ Allergy & Airway Dis EU, Brussels, Belgium
[3] Univ Coll London Hosp, Royal Natl Throat Nose & Ear Hosp, London, England
[4] Univ Ghent, Upper Airways Res Lab, Ghent, Belgium
[5] Karolinska Univ Hosp, Karolinska Inst, CLINTEC, Div ENT Dis, Stockholm, Sweden
[6] Karolinska Univ Hosp, Dept ENT Dis, Stockholm, Sweden
[7] Univ Barcelona, Hosp Clin, Dept Otorhinolaryngol, CIBERES,IDIBAPS, Barcelona, Catalonia, Spain
[8] Lund Univ, Dept Resp Med & Allergol, Lund, Sweden
[9] Univ Hosp Arnaud de Villeneuve, Dept Resp Dis, Montpellier, France
[10] IRCCS, Personalized Med Asthma & Allergy Humanitas Clin, Rozzano, MI, Italy
[11] Humanitas Univ, Dept Biomed Sci, Pieve Emanuele, MI, Italy
[12] Univ Montreal Hosp Ctr CHUM, Div Otolaryngol Head & Neck Surg, Montreal, PQ, Canada
[13] Univ Med Ctr Groningen, Dept Clin Pharm & Pharmacol, Groningen, Netherlands
[14] Univ Med Ctr Groningen, Dept Gen Practice, Groningen, Netherlands
[15] QPS NL, Groningen, Netherlands
[16] Charles Univ Prague, Fac Med 1, Dept Resp Med, Prague, Czech Republic
[17] Thomayer Hosp, Prague, Czech Republic
[18] Eastern Virginia Med Sch, Dept Otolaryngol Head & Neck Surg, Norfolk, VA 23501 USA
[19] Guys & St Thomas NHS Fdn Trust, London, England
[20] Univ Hosp Nancy, ENT Dept, Brabois ILM, Nancy, France
[21] Ghent Univ Hosp, Dept Resp Med, Ghent, Belgium
[22] Opuscomms, London, England
[23] Univ Calif Los Angeles, Dept Head & Neck Surg, Rhinol & Endoscop Skull Base Surg, Los Angeles, CA USA
[24] Univ Pittsburgh, Sch Med, Dept Otolaryngol Head & Neck Surg, Div Sinonasal Disorders & Allergy, Pittsburgh, PA 15261 USA
[25] Dept Microbiol Immunol & Transplantat, Allergy & Clin Immunol Res Grp, Leuven, Belgium
[26] Univ North Carolina Chapel Hill, Div Rhinol Allergy & Endoscop Skull Base Surg, Chapel Hill, NC USA
[27] Univ Hosp Leuven, Dept Otorhinolaryngol Head & Neck Surg, Leuven, Belgium