1. Department of Botany, Ecology and Plant Physiology; University of Córdoba; CeiA3, Córdoba; Spain
2. ICAAM - Institute of Mediterranean Crop and Environmental Sciences; University of Évora; Évora; Portugal
3. Finnish Meteorological Institute; Helsinki; Finland
4. Laboratory of Allergology; Department of Clinical and Experimental Medicine; University of Parma; U.O. Medical Immunology; University Hospital of Parma; Parma; Italy
5. Department of Oto-Rhino-Laryngology; Research Unit Aerobiology and Pollen Information; Medical University of Vienna; Vienna; Austria
6. Interdepartmental Centre of Bioclimatology; University of Florence; Florence; Italy
7. Aerobiology Laboratory; Biology Department, Science and Arts Faculty; Uludag University; Gorukle-Bursa; Turkey
8. Laboratory of Aeropalynology; Faculty of Biology; Adam Mickiewicz University; Poznań; Poland
9. National Pollen and Aerobiology Research Unit; University of Worcester; Worcester; UK
10. Aerobiology Unit; University of Turku; CERUT; Turku; Finland
11. Allergopharma Joachim Ganzer KG; Reinbek; Germany
12. Department of Environmental Research; Siauliai University; Siauliai; Lithuania
13. RNSA (Réseau National de Surveillance Aérobiologique); Brussieu; France