1. Department of Dermatology; HELIOS Klinikum Hildesheim GmbH; Hildesheim Germany
2. Dermatopathologie Friedrichshafen Bodensee; Bodensee Germany
3. Medizinisches Versorgungs-Zentrum Charlottenburg; Berlin Germany
4. Hautzentrum Dr. Martin Kägi, MD; Zürich Switzerland
5. Dermatology Practice; St. Gallen Switzerland
6. Dermatology Practice; Biel Switzerland
7. Dermatology Unit; Kantonsspital Lucerne; Lucerne Switzerland
8. Kempf und Pfaltz; Research Unit; Histologische Diagnostik; Zürich Switzerland