1. Allergy Unit Infanta Leonor University Hospital Madrid Spain
2. Faculty of Medicine University Children's Hospital of Belgrade University of Belgrade Belgrade Serbia
3. Allergy Unit Centro Hospitalar Universitário do Porto Porto Portugal
4. Safra Children's Hospital and the Clinical Immunology, Angioedema and Allergy Unit Chaim Sheba Medical Center, Tel Hashomer Faculty of Pediatric Medicine Sackler Medical School Tel Aviv University Tel Aviv Israel
5. Department of Pediatric Allergy and Immunology Faculty of Medicine Mersin University Mersin Turkey
6. Allergy Unit Department of Pediatric Meyer Children’s Hospital Florence Italy
7. Department of Pediatric Allergy School of Medicine Hacettepe University Ankara Turkey
8. Pediatric Allergy Unit Department of Child and Adolescent Geneva University Hospital Geneva Switzerland