1. University Hospital Schleswig-Holstein; Institute of Occupational Medicine, Prevention and Occupational Health Management; 23562 Lübeck Ratzeburger Allee 160 Germany
2. Friedrich-Alexander University Erlangen-Nürnberg (FAU); Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine; 91054 Erlangen Henkestr. 9-11 Germany
3. Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH); Research Unit Analytical BioGeoChemistry; 85764 Neuherberg Ingolstädter Landstraße 1 Germany
4. Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, Friedrich-Alexander University Erlangen-Nürnberg (FAU); Chair of the Working Group “Setting of Threshold Limit Values in Biological Materials”, Deutsche Forschungsgemeinschaft; 91054 Erlangen Henkestr. 9-11 Germany
5. Institute of Applied Biosciences, Karlsruhe Institute of Technology (KIT); Chair of the Permanent Senate Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area, Deutsche Forschungsgemeinschaft, Department of Food Chemistry and Toxicology; 76131 Karlsruhe Adenauerring 20a, Building 50.41 Germany