1. Friedrich-Alexander University Erlangen-Nürnberg (FAU); Method development and Chair of the working group “Analyses in Biological Materials”, Deutsche Forschungsgemeinschaft, Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine; 91054 Erlangen Schillerstraße 25 and 29 Germany
2. Friedrich-Alexander University Erlangen-Nürnberg (FAU); Method development, Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine; 91054 Erlangen Schillerstraße 25 and 29 Germany
3. Medical Laboratory Bremen; External verification; 28357 Bremen Haferwende 12 Germany
4. 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