1 Technical University of Munich, School of Medicine, Department of Dermatology and Allergy, Munich, Germany.
2 Technical University of Munich, School of Medicine, Department of Dermatology and Allergy, Munich, Germany; Karolinska Institutet, Department of Medicine, Karolinska University Hospital, Unit of Dermatology and Venerology, Solna, Sweden.
3 Technical University of Munich, School of Medicine, Department of Dermatology and Allergy, Munich, Germany. Electronic address: alexander.zink@tum.de.