[1] Hosp Clin & Univ, Dept Otorhinolaryngol, Rhinol Unit, Barcelona 08036, Spain
[2] Hosp Clin & Univ, Dept Otorhinolaryngol, Smell Clin, Barcelona 08036, Spain
[3] Hosp Municipal Badalona, Dept Otorhinolaryngol, Barcelona, Spain
[4] IDIBAPS, Barcelona, Spain