[1
]
a Department of Allergology , Hospital Quirón , Barcelona , Spain.
[2
]
b Upper Airway Research Laboratory, Department of Oto-rhino-laryngology , Ghent University
, Ghent , Belgium.
[3
]
c Unitat de Rinologia & Clínica de l'Olfacte, ENT Department , Hospital Clínic i Universitari;
Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS); and CIBER de Enfermedades
Respiratorias (CIBERES) , Barcelona , Spain.