1. University Clinic of Respiratory and Allergic Diseases Golnik Slovenia
2. Faculty of Pharmacy University of Ljubljana Ljubljana Slovenia
3. Faculty of Medicine University of Maribor Maribor Slovenia
4. Department of Dermatology and Venerology Medical University of Graz Graz Austria
5. Allergy Outpatient Clinic Reumannplatz Vienna Austria
6. Laboratory of Allergic Diseases National Institute of Allergy and Infectious Diseases, National Institutes of Health Bethesda Maryland USA
7. Biotechnical Faculty University of Ljubljana Ljubljana Slovenia
8. Medical Faculty University of Ljubljana Ljubljana Slovenia
9. The Department of Hematology University Medical Center Ljubljana Ljubljana Slovenia
10. Department of Clinical and Environmental Allergology Jagiellonian University Medical College Krakow Poland
11. Clinic for Respiratory Diseases Jordanovac University Hospital Centre Zagreb Zagreb Croatia