1. Center for Rhinology and Allergology Wiesbaden Germany
2. Department of Otorhinolaryngology, Head and Neck Surgery Medical Faculty Mannheim Universitätsmedizin Mannheim Heidelberg University Mannheim Germany
3. HAL Allergy BV Leiden The Netherlands
4. Departments of Experimental Immunology and of Otorhinolaryngology Academic Medical Center University of Amsterdam Amsterdam The Netherlands
5. Department of Respiratory Medicine & Allergology Institute for Clinical Science Skane University Hospital Lund Sweden
6. Departments of Clinical Pharmacy & Pharmacology and General Practice University Medical Center Groningen University of Groningen Groningen The Netherlands
7. Dept. of Internal Medicine Asthma and Allergy Medical University of Lodz Lodz Poland
8. Department of Allergology and Immunology Medical Faculty in Plzen Charles University Prague Prague Czech Republic