[1
]ISNI 0000 0004 0461 6320, GRID grid.48769.34, Cliniques Universitaires Saint-Luc Brussels, ; Av. Hippocrate 10, 1200 Brussels, Belgium
[2
]ISNI 0000000404654431, GRID grid.5650.6, Department of Otorhinolaryngology, , Amsterdam University Medical Centres, AMC, ; Amsterdam, The Netherlands
[3
]ISNI 0000 0004 0626 3303, GRID grid.410566.0, Upper Airway Research Laboratory, Dep. of Otorhinolaryngology, , Ghent University Hospital, ; Ghent, Belgium
[4
]ISNI 0000 0000 9350 8874, GRID grid.411702.1, Bispebjerg University Hospital, ; Copenhagen, Denmark
[5
]Faculty of Medicine, Transsylvania University, Brasov, Romania
[6
]ISNI 0000 0004 1937 0247, GRID grid.5841.8, Hospital Clínic, IDIBAPS, , CEBERES Universitat de Barcelona, ; Catalonia, Spain
[7
]ISNI 0000 0004 1769 0319, GRID grid.416936.f, Centro Medico Teknon, ; Barcelona, Spain
[8
]ISNI 0000 0000 9241 5705, GRID grid.24381.3c, Department of Ear, Nose and Throat Diseases, , Karolinska University Hospital, ; Stockholm, Sweden
[9
]ISNI 0000 0001 2069 7798, GRID grid.5342.0, Pharmaceutical Care Unit, Faculty of Pharmaceutical Sciences, , Ghent University, ; Ghent, Belgium
[10
]GRID grid.411457.2, Allergy Unit, , Hospital Regional Universitario of Málaga, IBIMA, ARADyAL, ; Malaga, Spain
[11
]ISNI 0000 0004 0626 3338, GRID grid.410569.f, Department of Ear, Nose and Throat Disease, , University Hospitals, ; Louvain, Belgium
[12
]GRID grid.425213.3, ENT Department, , Guy’s & St Thomas’ Hospital, ; London, UK
[13
]Center of Rhinology and Allergology, Wiesbaden, Germany
[14
]ISNI 0000 0000 9950 5666, GRID grid.15485.3d, Skin and Allergy Hospital, , Helsinki University Hospital and University of Helsinki, ; Helsinki, Finland
[15
]ISNI 0000 0000 8580 3777, GRID grid.6190.e, University of Cologne, ; Cologne, Germany
[16
]London Allergy and Immunology Center, London, UK
[17
]GRID grid.439342.b, Royal National Throat, Nose and Ear Hospital, ; London, UK
[18
]ISNI 0000 0000 8988 2476, GRID grid.11598.34, Medical University Graz, ; Graz, Austria
[19
]ISNI 0000 0001 2176 9917, GRID grid.411327.2, Heinrich-Heine-University, ; Düsseldorf, Germany
[20
]ISNI 0000 0004 0407 1981, GRID grid.4830.f, Department of Clinical Pharmacy & Pharmacology, University Medical Center Groningen,
Groningen Research Institute for Asthma and COPD (GRIAC), , University of Groningen, ; Groningen, The Netherlands
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