1. RIKILT—Institute of Food Safety, Wageningen University and Research Centre, P.O. Box 230, 6700 AE Wageningen, The Netherlands
2. Department of Food Chemistry and Analysis, Institute of Chemical Technology Prague, Technická 3, 166 28 Prague 6, Czech Republic
3. Biosciences Research Laboratory, U.S. Department of Agriculture—Agricultural Research Service, 1605 Albrecht Boulevard 58102, Fargo, North Dakota, United States
4. Department of Biotechnology, Veterinary Research Institute, Hudcova 70, 621 32 Brno, Czech Republic
5. Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands