1. Chemisches und Veterinäruntersuchungsamt (CVUA) Karlsruhe, Karlsruhe, Germany.
2. Ministry of Rural Affairs and Consumer Protection, Stuttgart, Germany.
3. Department of Life Sciences, Albstadt-Sigmaringen University, Sigmaringen, Germany.
4. IEL Nutritional Epidemiology, University of Bonn, Bonn, Germany.
5. Research Institute of Child Nutrition (FKE), Dortmund, Germany.