| Affiliation: | 1. Upper Airways Research Laboratory, Department of Otorhinolaryngology and Head and Neck Surgery, Ghent University, Ghent, Belgium;2. Institute for Social Medicine, Epidemiology and Health Economics, Charité – Universit?tsmedizin Berlin, Berlin, Germany;3. Institute of Clinical Epidemiology and Biometry, University Würzburg, Würzburg, Germany;4. Department of Paediatric Pneumology and Immunology, Charité – Universit?tsmedizin Berlin, Berlin, Germany;5. Division of Ear, Nose, and Throat Diseases, Clintec, Karolinska Institutet, Stockholm, Sweden |
