1. Department of Food Science, Faculty of Agricultural Sciences, University of Aarhus, P.O. Box 102, DK-5792 Årslev, Denmark
2. Department of Animal Health and Bioscience, Faculty of Agricultural Sciences, University of Aarhus, P.O. Box 50, DK-8830 Tjele, Denmark
3. Research Division, DLF-Trifolium A/S, Højerupvej 31, 4660 Store Heddinge, Denmark
4. Carlsberg Laboratory, Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark