1. Department of Dermatology and Allergology; Ludwig Maximilian University; Germany
2. Department of Dermatology and UCD Charles Institute for Translational Dermatology; University College Dublin; Ireland
3. Department of Dermatology; University Hospital Tübingen; Tübingen Germany
4. Centre for Psychosomatic Medicine, Psychosomatic Dermatology; University Hospital Gießen; Germany
5. Department of Dermatology, Venereology and Allergology; Johann Wolfgang Goethe University; Frankfurt/Main Germany
6. Department of Dermatology; University Hospital Düsseldorf; Düsseldorf Germany
7. Centre for Dermatology, Allergology and Dermatologic Surgery; Helios Kliniken Wuppertal, Witten/Herdecke University; Germany
8. Department of Dermatology; University Hospital Münster; Germany