1. BASF SE; Corporate Health Management, FEH/CB; 67056 Ludwigshafen Germany
2. Friedrich-Alexander University Erlangen-Nürnberg (FAU); Chair of the Working Group “Setting of Threshold Limit Values in Biological Material”, Deutsche Forschungsgemeinschaft, Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine; 91054 Erlangen Henkestr. 9-11 Germany
3. 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, Institute of Applied Biosciences, Department of Food Chemistry and Toxicology; 76131 Karlsruhe Adenauerring 20a, Building 50.41 Germany