1. Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
2. Department of Dermatology, University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany
3. Makromolekulare Chemie II, University of Bayreuth, 95440 Bayreuth, Germany