1 Rhinology Unit & Smell Clinic, ENT Department, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain; Clinical and Experimental Respiratory Immunoallergy, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain; Center of Biomedical Research in Respiratory Diseases (CIBERES), Barcelona, Spain. Electronic address: jmullol@clinic.cat.
2 Center of Biomedical Research in Respiratory Diseases (CIBERES), Barcelona, Spain; Rhinology and Skull Base Surgery Unit, ENT Department, Ramon y Cajal University Hospital, Madrid, Spain.
3 Center of Biomedical Research in Respiratory Diseases (CIBERES), Barcelona, Spain; Hospital Son Espases, Palma de Mallorca, Spain.
4 Rhinology Unit & Smell Clinic, ENT Department, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain; Clinical and Experimental Respiratory Immunoallergy, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain; Center of Biomedical Research in Respiratory Diseases (CIBERES), Barcelona, Spain.
5 Clinical and Experimental Respiratory Immunoallergy, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain; Center of Biomedical Research in Respiratory Diseases (CIBERES), Barcelona, Spain.