1. Department of Immunology Rheumatology and Allergy; Medical University of Lodz; Lodz; Poland
2. Ambulatorio di Allergologia; Clinica San Carlo; Paderno Dugnano; Italy
3. Department of Immunology and Allergy; Ankara University School of Medicine; Ankara; Turkey
4. Allergy Service; Carlos Haya Hospital; Malaga; Spain
5. Allergy Service; Infanta Leonor Hospital; Madrid; Spain
6. Department of Respiratory Diseases; Jagiellonian University; Krakow; Poland
7. Department of Dermatology und Allergology Biederstein and Division Environmental Dermatology and Allergology; Helmholtz Zentrum Munchen/TUM; Technical University Munich; Munich; Germany
8. Department of Allergy; University Hospital of SanJoão; Porto; Portugal
9. Internal Medicine and Rheumatology; Rimini Hospital; Rimini; Italy
10. Department of Allergy; Hospital Pediatrico Maria Pia; Porto; Portugal
11. Department of Medicine; Jagiellonian University; Krakow; Poland
12. Allergy and Clinical Immunology Unit; Azienda Sanitaria di Firenze; San Giovanni di Dio Hospital; Florence; Italy
13. Floridsdorf Allergy Centre (FAZ); Vienna; Austria