1. Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Kasteelpark Arenberg 20, B-3001 Leuven, Belgium.
2. Current address: Genzyme Flanders, Cipalstraat 8, B-2440 Geel, Belgium.
3. Puratos, Industrialaan 25, B-1702 Groot-Bijgaarden, Belgium.