1. Allergy Department 2nd Pediatric Clinic, National and Kapodistrian University of Athens Athens Greece
2. Division of Infection, Immunity & Respiratory Medicine University of Manchester Manchester UK
3. Allergy Unit 2nd Department of Dermatology and Venereology National and Kapodistrian University of Athens Athens Greece
4. Department of Otorhinolaryngology University of Crete, School of Medicine Heraklion Greece
5. Department of Otorhinolaryngology Democritus University of Thrace Alexandroupolis Greece