1. Institute and Comprehensive Center for Inflammation Medicine University of Lübeck Ratzeburger Allee 160 23435 Lübeck Germany
2. K Papp Clinical Research and Probity Medical Research University of Western Ontario Waterloo ON Canada
3. CHU Sainte‐Justine Montreal Montreal QC Canada
4. Pediatric Dermatology Department University Children's Hospital Zurich, and Dermatology Department University Hospital Zurich Zurich Switzerland
5. University Clinic of Frankfurt am Main, Department of Dermatology, Venereology and Allergology Frankfurt am Main Germany
6. UCL St Luc Brussels Belgium
7. Nexus Clinical Research and Memorial University of Newfoundland St John's NL Canada
8. Department of Pediatric Dermatology Catholic Children's Hospital Hamburg Germany
9. AbbVie Deutschland GmbH & Co. KG Ludwigshafen Germany
10. Department of Dermatology and Radboud Institute for Health Sciences Radboud University Medical Center Nijmegen the Netherlands
11. AbbVie Inc. North Chicago IL U.S.A.
12. Department of Dermatology, Venerology and Allergy Charité Universitätsmedizin Berlin Berlin Germany