Affiliation: | * Animal Nutrition Group, Wageningen University, Marijkeweg 40, 6709 PG Wageningen, the Netherlands † Livestock Research, Animal Sciences Group, Wageningen University and Research Centre, PO Box 65, 8200 AB Lelystad, the Netherlands ‡ Centre for Nutrition Modelling, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, N1G 2W1, Canada § Department of Animal Science, University of California, Davis 95616 |