1. Klinik für Dermatologie, Venerologie und Allergologie Universitätsklinikum Schleswig‐Holstein Kiel Germany
2. Department of Dermatology Mazandaran University of Medical Sciences Sari Iran
3. Department of Dermatology University of Studies Guglielmo Marconi Rome Italy
4. Department of Dermatology University Medical Center Mainz Mainz Germany
5. Department of Dermatology University Hospital Basel Basel Switzerland