About the Authors

Michael Forgber

Affiliation Department of Dermatology, Venerology and Allergy, Charité -Universitätsmedizin Berlin, Humboldt University, Berlin, Germany

Uwe Trefzer

Affiliation Department of Dermatology, Venerology and Allergy, Charité -Universitätsmedizin Berlin, Humboldt University, Berlin, Germany

Wolfram Sterry

Affiliation Department of Dermatology, Venerology and Allergy, Charité -Universitätsmedizin Berlin, Humboldt University, Berlin, Germany

Peter Walden

peter.walden@charite.de

Affiliation Department of Dermatology, Venerology and Allergy, Charité -Universitätsmedizin Berlin, Humboldt University, Berlin, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MF PW. Performed the experiments: MF. Analyzed the data: MF PW. Contributed reagents/materials/analysis tools: UT WS. Wrote the paper: PW.