1. Harvard Medical School and Clinical Laboratory for Epidemiology and Applied Research in Skin (CLEARS), Department of Dermatology Beth Israel Deaconess Medical Center Boston Massachusetts USA
2. Novartis Institutes for BioMedical Research Novartis Pharma AG Basel Switzerland
3. Department of Dermatology Erasmus University Medical Centre Rotterdam Netherlands
4. Department of Dermatology, Venereology and Allergology Ruhr‐University Bochum Bochum Germany
5. Advanced Medical Research Atlanta Georgia USA
6. Department of Dermatology, Zeeland University Hospital, Roskilde, Health Sciences Faculty University of Copenhagen Roskilde Denmark