1. Section of Rhinology and Allergy, Department of Otorhinolaryngology, Head and Neck Surgery University Hospital Marburg, Philipps‐Universität Marburg Marburg Germany
2. Department of Otolaryngology University Hospital Muenster, Muenster, Germany and Department of Otolaryngology, Head and Neck Cancer University Clinic Greifswald Greifswald Germany
3. Institute for Pharmacology and Toxicology, University of Bonn, Bonn and University of Witten‐Herdecke Herdecke Germany
4. Chair of Naturopathic Medicine University Medicine Rostock Rostock Germany
5. PHARMALOG Institut für klinische Forschung GmbH Ismaning Germany
6. G. Pohl‐Boskamp GmbH & Co. KG Hohenlockstedt Germany