1. Department of Dermatology, Inselspital University of Berne Bern Switzerland
2. Institut for Infectious Diseases University of Berne Bern Switzerland
3. Dermatology Practice Dermaticum Freiburg Germany
4. Centro de Dermatología Instituto CUF Matosinhos, Porto Portugal
5. Kliniek Huidziekten University Hospitals Gent Belgium