1. Department of Otorhinolaryngology- Head and Neck surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
2. Division of Allergy and Clinical Immunology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
3. Department of Allergy, Skin and Allergy Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
4. Allergy Centre, Tampere University Hospital, Tampere, Finland
5. Faculty of Social Sciences, Tampere University, Tampere, Finland
6. Division of Otolaryngology – Head and Neck Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
7. Haartman Institute, Medicum, University of Helsinki, Helsinki, Finland
8. Department of Otolaryngology, University of Eastern Finland, Kuopio, Finland