1. Private Dermatology Office/CMB Collegium Medicum Berlin GmbH Luisenstraße 54/55 10117 Berlin Germany
2. Department of Dermatology Charité Universitätsmedizin Berlin Berlin Germany
3. Department of Dermatology and Allergology University Hospital Munich Munich Germany
4. Private Dermatology Office Freising Germany
5. Private Dermatology Office Prof Thomas Dirschka Wuppertal Germany
6. Dermatology Center Bonn Friedensplatz Bonn Germany
7. Department for Dermatology and Allergology General Hospital Augsburg Augsburg Germany