1. Institute and Outpatient Clinic for Occupational and Environmental Medicine; Friedrich-Alexander-University Erlangen-Nuremberg; Schillerstrasse 25/29 91054 Erlangen Germany
2. Department of Food Chemistry and Toxicology; Institute for Applied Biosciences; Karlsruhe Institute of Technology (KIT); Kaiserstrasse 12 76131 Karlsruhe Germany