1. Environmental Informatics Research Group; Department of Mechanical Engineering; Aristotle University; Thessaloniki Greece
2. German Pollen Information Service Foundation; Berlin Germany
3. Charité - Universitätsmedizin Berlin; Department of Dermatology; Venerology and Allergology; Berlin Germany
4. Aerobiology and Pollen Information Research Unit; Department of Oto-Rhino-Laryngology; Medical University of Vienna; Vienna Austria
5. Department of Otorhinolaryngology, Head and Neck Surgery; Universitätsmedizin Mannheim; Medical Faculty Mannheim; Heidelberg University; Mannheim Germany
6. Center for Rhinology and Allergology; Wiesbaden Germany