1. Department of Dermatology; Sint Franciscus Vlietland Group; Vlietland Hospital; Rotterdam/Schiedam The Netherlands
2. Klinik und Poliklinik für Dermatologie und Allergologie am Biederstein; Technische Universität München; München Germany
3. Department of Dermatology & Allergy Center; Odense University Hospital; Odense Denmark
4. Department of Dermatology & Allergy; Hillingdon Hospitals NHS Foundation Trust; Uxbridge (London) UK
5. Department of Dermatology and Allergy; Allergy-Center Charité; Charité - Universitätsmedizin Berlin; Berlin Germany
6. Department of Pediatrics; Padua General University Hospital; Padua Italy
7. Allergy Unit; Department of Dermatology; University of Zürich; Zürich Switzerland
8. Department of Dermatology; Universitat Internacional de Catalunya; Barcelona Spain
9. Department of Experimental Dermatology and Cosmetology; Jagiellonian University Medical College; Krakow Poland
10. Clinic of Children's Diseases; Faculty of Medicine; Vilnius University; Vilnius Lithuania
11. Department of Paediatric Allergy & Dermatology; St John's Institute of Dermatology; St Thomas' Hospital & King's College London; London UK
12. Department of Pediatrics; Odense University Hospital; Odense Denmark
13. Department of Pediatrics - Chief Division of Allergy; Pediatric Hospital Bambino Gesu; Roma Vatican City Italy
14. Department of Allergology/Immunology; CUF Descobertas Hospital; Lisbon and NOVA Medical School; Lisbon Portugal
15. Department of Dermatology; Dermicis Skin Hospital; Alkmaar, Foundation Pediatric Dermatology; Rotterdam The Netherlands