1. Department of Biology University of Copenhagen Universitetsparken 13 Copenhagen 2100 Denmark
2. Department of Dermatology Copenhagen University Hospital Bispebjerg and Frederiksberg Bispebjerg Bakke 23 Copenhagen 2400 Denmark
3. Department of Pharmacy University of Copenhagen Universitetsparken 2 Copenhagen 2100 Denmark
4. Department of Dermatology, Venereology and Allergy University of Leipzig Leipzig 04103 Germany