1. Pharmaceutical Chemistry I,
Pharmaceutical Institute, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany
2. ELFI Analytik GbR, Massenhausener
Strasse 18a, D-85375 Neufahrn, Germany
3. Food Chemistry Institute (LCI) of the Association of the German Confectionery Industry, Adamsstrasse 52-54, D-51063 Köln, Germany
4. Bioanalytics, Department of
Nutrition and Food Sciences, University of Bonn, Endenicher Allee 11-13, D-53115 Bonn, Germany