1. Department of Otorhinolaryngology, Head and Neck Surgery Section of Rhinology and Allergy University Hospital Marburg Philipps‐Universität Marburg Marburg Germany
2. Environmental Informatics Research Group Department of Mechanical Engineering Aristotle University of Thessaloniki Thessaloniki Greece
3. Aerobiology and Pollen Information Research Unit Department of Oto‐Rhino‐Laryngology Medical University of Vienna Vienna Austria
4. ZAUM Center of Allergy & Environment Helmholtz Center Munich/Technische Universität München Member of the German Center for Lung Research (DZL) Munich Germany
5. Kühne Foundation Christine Kühne ‐Center for Allergy Research and Education (CK‐CARE) Munich Germany
6. Department of Dermatology and Allergy Biederstein Technical University of Munich Munich Germany
7. Departement de Pneumologie et Addictologie Hôpital Arnaud de Villeneuve University Hospital of Montpellier Montpellier France
8. Section of Allergy and Clinical Immunology Imperial College London London UK
9. Department of Botany, Ecology and Plant Physiology University of Cordoba Cordoba Spain
10. Federal Office of Meteorology and Climatology MeteoSwiss Zurich Switzerland
11. Section of Allergology Department of Internal Medicine Erasmus MC Rotterdam the Netherlands
12. ALC, Allergy Learning and Consulting Copenhagen Denmark
13. Center for Rhinology and Allergology Wiesbaden Germany
14. Biodiversity Unit University of Turku Turku Finland
15. Finnish Meteorological Institute Helsinki Finland
16. RNSA‐French Aerobiology Network Brussieu France
17. German Pollen Information Service Foundation Berlin Germany