1. Currenta GmbH & Co. OHG; Method development, CUR-SEL-ANT-UWA; 47829 Uerdingen R800, 12 Germany
2. Currenta GmbH & Co. OHG; Method development, CUR-SEL-SER-GS-BLM-Institute for Biomonitoring; 51368 Leverkusen Gebäude L9 Germany
3. Medical Laboratory Bremen; External verification; 28357 Bremen Haferwende 12 Germany
4. Friedrich-Alexander University Erlangen-Nürnberg (FAU); Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine; 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