[1] Hosp Quiron, Dept Allergol, Barcelona, Catalonia, Spain
[2] Hosp Clin & Univ, Inst Invest Biomed August Pi & Sunyer IDIBAPS, ICT, Dept Pneumol & Resp Allergy, Barcelona, Catalonia, Spain
[3] CIBER Enfermedades Resp CIBERES, Barcelona, Catalonia, Spain
[4] Hosp Clin & Univ, Inst Invest Biomed August Pi & Sunyer IDIBAPS, Dept Otorhinolaryngol, Rhinol Unit, Barcelona, Catalonia, Spain
[5] Hosp Clin & Univ, Inst Invest Biomed August Pi & Sunyer IDIBAPS, Dept Otorhinolaryngol, Smell Clin, Barcelona, Catalonia, Spain
[6] IDIBAPS, Hosp Clin, Dept Otorhinolaryngol, Rhinol Unit, Barcelona 08036, Catalonia, Spain
[7] IDIBAPS, Hosp Clin, Dept Otorhinolaryngol, Smell Clin, Barcelona 08036, Catalonia, Spain