1 Department of Dermatology, Venereology, and Allergology, Helios St Elisabeth Hospital Oberhausen, University Witten-Herdecke, Oberhausen, Germany. Electronic address: alexander.kreuter@helios-gesundheit.d.
2 Department of Dermatology, Venereology, and Allergology, Helios St Elisabeth Hospital Oberhausen, University Witten-Herdecke, Oberhausen, Germany.