1. Department of Dermatology; University of Lübeck; 23538 Lübeck Germany
2. Comprehensive Center for Inflammation Medicine, University Hospital Schleswig-Holstein; 23538 Lübeck Germany
3. Laboratory for Analytical Chemistry, Department of Chemistry and Biochemistry; Faculty of Food Technology and Biotechnology, University of Zagreb; 10000 Zagreb Croatia
4. Coronel Institute of Occupational Health, Academic Medical Centre; 1100 AZ Amsterdam The Netherlands