1. Department of Dermatology and Allergy; Hannover Medical University; Hannover Germany
2. Ambulatorio di Allergologia; Clinica San Carlo; Paderno Dugnano; Milan Italy
3. Allergy Unit; Department of Dermatology; University Hospital Zürich; Zürich Switzerland
4. Division of Paediatric Pneumology and Immunology; Charité University Hospital; Berlin Germany
5. Allergy Division; Hospital General de Castellón; Castellón Spain
6. Department of Dermatology/Allergology; University Medical Center Utrecht; Utrecht The Netherlands
7. Associated Center for Molecular Allergology (CAAM); Latina Italy
8. The Referral Centre for Food Allergy Diagnosis and Treatment Veneto Region; Department of Mother and Child Health; University of Padua; Padua Italy
9. Department of Infection and Immunity; Luxembourg Institute of Health; Esch-sur-Alzette; Luxembourg and Department of Dermatology and Allergy; Biederstein; Technische Universität München (TUM); Munich Germany
10. Allergy Clinic Copenhagen University Hospital at Gentofte; Copenhagen Denmark
11. Division of Allergology; Paul-Ehrlich Institute; Langen Germany
12. Department of Dermatology and Allergy; of Charité - Universitätsmedizin Berlin; Berlin Germany
13. Department of Pathophysiology and Allergy Research; Medical University of Vienna; Vienna Austria