About the Authors

Isabel Steinbrenner

Affiliation Department of Pharmaceutical Technology, Eberhard Karls University Tuebingen, Tuebingen, Germany

Pia Houdek

Affiliation University Hospital Hamburg Eppendorf, Department of Dermatology & Venerology, Hamburg, Germany

Simone Pollok

Affiliation University Hospital Hamburg Eppendorf, Department of Dermatology & Venerology, Hamburg, Germany

Johanna M. Brandner

‡ These authors are shared senior authors on this work.

Affiliation University Hospital Hamburg Eppendorf, Department of Dermatology & Venerology, Hamburg, Germany

Rolf Daniels

rolf.daniels@uni-tuebingen.de

‡ These authors are shared senior authors on this work.

Affiliation Department of Pharmaceutical Technology, Eberhard Karls University Tuebingen, Tuebingen, Germany

Competing Interests

This study was funded by the German Federation of Industrial Research Associations (AiF) (http://www.aif.de/en) as part of a project (KF2387901SK9) where in addition the Birken AG, Niefern-Öschelbronn, Germany, participated. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JMB RD. Performed the experiments: IS PH SP. Analyzed the data: IS PH SP JMB RD. Contributed reagents/materials/analysis tools: JMB RD. Wrote the paper: IS PH SP JMB RD.