1 Department Dermatology and Allergology Biederstein, Technical University Munich, Biedersteiner Straße 29, 80802 Munich, Germany.
2 Department of Pediatrics, Division of Pulmonology, Immunology and Critical Care Medicine, Charité-University Hospital Berlin, Berlin, Germany.
3 Department of Dermatology, University Hospital of Basel, Basel, Switzerland.
4 Clinic for Anaesthesiology, Intensive Care Medicine, Emergency Medicine and Pain Therapy, ALB FILS Hospitals Göppingen, Göppingen, Germany.
5 Department of Dermatology, University Hospital Göttingen, Göttingen, Germany.
6 Department of Anesthesiology and Operative Intensive Care Medicine, Medical Faculty, University of Augsburg, Augsburg, Germany.
7 Dr. von Hauner Children's Hospital, Ludwig Maximilians University, Munich, Germany.
8 Department of Pediatrics, University Hospital Salzburg, Salzburg, Austria.
9 Department of Dermatology and Allergology, University Medical Center Gießen (UKGM), Justus-Liebig-University Gießen, Gießen, Germany.
10 Center of Rhinology and Allergology, Wiesbaden, Germany.
11 Pediatric Respiratory Medicine, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
12 St. Marien-Hospital Bonn, Bonn, Germany.
13 Section of Rhinology and Allergy, Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-University Marburg, Marburg, Germany.
14 Department of Pediatrics, University Hospital Cologne, Cologne, Germany.
15 Department of Dermatology and Allergology, Hospital of the Ludwig Maximilians University, Munich, Germany.
16 German Allergy and Asthma Association, Mönchengladbach, Germany.
17 Institute of Pharmacology, Hannover Medical School, Hannover, Germany.
18 Medical practice for pediatrics and youth medicine, Poppelsdorfer Allee, Bonn, Germany.
19 Department of Dermatology, Venereology, and Allergology, Leipzig Interdisciplinary Allergy Center, University Hospital Leipzig, Leipzig, Germany.
20 Department of Pediatric Pneumology and Allergology, University Hospital Carl Gustav Carus, Technical University of Dresden, Dresden, Germany.
21 Immunodermatology and Experimental Allergology Unit, Department of Dermatology, Allergology, and Venereology, Medical University Hannover, Hannover, Germany.
22 Department of Dermatology, Venereology, and Allergology, Charité-University Hospital Berlin, Berlin, Germany.
23 Institute for Surgical Research, Philipps-University Marburg, Marburg, Germany.