1. Department of Dermatology, Environmental Medicine, Health Theory University of Osnabrück 49090 Osnabrück Germany
2. Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) at the University of Osnabrück and Dermatologic Centre Trauma Hospital 21033 Hamburg Germany
3. Department of Clinical Social Medicine Centre of Health Systems Research, Occupational and Environmental Dermatology University of Heidelberg 69115 Heidelberg Germany
4. Department of Dermatology University Hospital Jena 07740 Jena Germany
5. Statutory Accident Insurance Clinic of Occupational Diseases 08223 Falkenstein Germany
6. Clinic for Occupational Diseases of the VBG (Statutory Accident Insurance) 83435 Bad Reichenhall Germany