1. Department of Dermatology, Venereology and Allergology; Ruhr-University; Bochum Germany
2. Department of Dermatology; Monklands Hospital; Lanarkshire UK
3. University of Glasgow; Glasgow UK
4. Department of Dermatology and Allergology; Vest Hospital; Academic Teaching Hospital University of Bochum; Recklinghausen Germany
5. CentroDerm Clinic; Wuppertal Germany
6. Faculty of Health; University Witten-Herdecke; Witten Germany