1. Department for Children and Adolescents, Division of Allergy, Pulmonology and Cystic fibrosis University Hospital Frankfurt Germany
2. Department for Internal Medicine, Division of Allergy, Pulmonology and Cystic Fibrosis University Hospital Frankfurt Germany
3. Division of Biostatistics and Mathematical Modelling Goethe University Frankfurt Germany
4. Department of Otorhinolaryngology Head‐ and Neck‐Surgery University Medical Center Mainz Mainz Germany