1. Department of Dermatology and Allergy Herlev and Gentofte Hospital University of Copenhagen Hellerup Denmark
2. Copenhagen Research Group for Inflammatory Skin (CORGIS) Herlev and Gentofte Hospital Hellerup Denmark
3. Department of Dermatology CHU Rennes Rennes France
4. University of Rennes, EA 7449 REPERES ‘Pharmacoepidemiology and Health Services Research’ Rennes France
5. Department of Dermatology and Venereology Bispebjerg HospitalUniversity of Copenhagen Copenhagen Denmark