1 Department of Dermatology and Allergy, LMU Munich, Munich, Germany.
2 Department of Dermatology, Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Brussels, Belgium.
3 Division of Evidence-Based Medicine (dEBM), Department of Dermatology, Venereology and Allergology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.
4 European Federation of Allergy and Airways Diseases Patients' Associations (EFA), Brussels, Belgium.
5 Department of Dermatology, Nantes Université, CHU Nantes, UMR 1280 PhAN, INRAE, Nantes, France.
6 Department of Dermatology and Allergy, University Hospital of Bonn, Bonn, Germany.
7 Children's Allergy Service, Evelina London Children's Hospital, Guy's and St. Thomas' NHS Foundation Trust, London, UK.
8 Department of Women and Children's Health, School of Life Course Sciences, Paediatric Allergy Group, King's College London, London, UK.
9 Dermatology Department, University of Brescia, Brescia, Italy.
10 University Hospital Lausanne, Lausanne, Switzerland.
11 Department of Dermatology, Aarhus University Hospital and Aarhus University, Aarhus, Denmark.
12 Department of Dermatology, University Hospital Basel, Basel, Switzerland.
13 Department of Dermatology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
14 Department of Dermatology, Amsterdam UMC (University Medical Centers), Amsterdam, The Netherlands.
15 Department of Dermatology, Univ. Giessen, Giessen, Germany.
16 Dermatology and Venereology Section, Department of Medicine, University of Verona, Verona, Italy.
17 Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece.
18 Department of Dermatology and Allergy Centre, Odense University Hospital, University of Southern Denmark, Odense, Denmark.
19 Department of Dermato-Venerology, Aarhus University Hospital, Aarhus, Denmark.
20 Dermatology Department, Oslo University Hospital, Oslo, Norway.
21 Department of Dermatology Allergology Biederstein, Technical University Munich, Munich, Germany.
22 Eczema Outreach Support (UK), Linlithgow, UK.
23 Dermatology, Hospital of Sant Pau, Barcelona, Spain.
24 Department of Dermatology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
25 Pediatric Dermatology Unit, Heim Pál National Children's Institute Budapest, Budapest, Hungary.
26 Department of Dermatology, Venereology and Allergology, Wroclaw Medical University, Wroclaw, Poland.
27 Hospital Infantil Niño Jesús, Madrid, Spain.
28 Hannover Medical School, Hannover, Germany.
29 St John's Institute of Dermatology, King's College London, London, UK.
30 Guy's & St Thomas' NHS Foundation Trust, London, UK.