1. Center for Dermatology Allergology and Dermatosurgery Helios University Hospital Wuppertal University of Witten/Herdecke Wuppertal Germany
2. Institute of Medical Microbiology and Hygiene Saarland University Homburg Germany
3. Department of Dermatology and Allergy University Hospital Ludwig Maximilian University Munich Munich Germany
4. Department of Dermatology University of Tübingen Tübingen Germany
5. Department of Dermatologic Surgery and Dermatology Artemed Clinic Munich Munich Germany
6. Medical Supply Center for Histology Cytology and Molecular Diagnostics Trier Trier Germany
7. Department of Dermatology and Allergology University Medical Center Technical University of Munich Munich Germany
8. Department of Dermatology Ludwigshafen City Hospital Ludwigshafen Germany