1. Institute for Health Services Research in Dermatology and Nursing University Medical Center Hamburg‐Eppendorf Hamburg Germany
2. The Dermatology Centre The University of ManchesterNIHR Manchester Biomedical Research Centre Manchester UK
3. Service of Dermatology and Venereology Centre Hospitalier Universitaire Vaudois Lausanne Switzerland
4. Department of Dermatology Hietzing Hospital Vienna Austria
5. Unit of Dermatology Department of Medicine Karolinska Institutet Stockholm Sweden
6. Department of Dermatology and Allergy Technical University of Munich Munich Germany
7. Dermatologikum Hamburg Hamburg Germany
8. College of Biomedical and Health Sciences Cardiff University Cardiff UK
9. Celgene Corporation Summit NJ USA
10. Celgene International Boudry Switzerland
11. Amgen Europe GmbH Rotkreuz Switzerland