1. Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin; and Berlin Institute of Health, Department of Dermatology and Allergy; Clinical Research Center for Hair and Skin Science; Berlin Germany
2. Department of Dermatology; University of Sheffield; Sheffield UK
3. Centre Sabouraud; Hôpital St. Louis; Paris France
4. Private Practices; Berlin, Leipzig Germany
5. Private Practice; Neuenhagen Germany
6. Department of Dermatology and Venerology; Papageorgiou Hospital; Aristotle University; Thessaloniki Greece
7. Department of Dermatology and Cutaneous Surgery; Miller School of Medicine; University of Miami; Miami FL USA
8. Private Practice; Bologna Italy
9. Department of Dermatology; Hopital Erasme; Université Libre de Bruxelles; Brussels Belgium
10. Department of Dermatology; University of Bologna; Bologna Italy
11. Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin; Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Dermatology and Allergy, Division of Evidence Based Medicine; Berlin Germany