1. University of Copenhagen, Dep. of Human Nutrition, Exercise and Sports, DK-1958 Frederiksberg, Denmark
2. INRA UR1341 ADNC, F-35590 Saint-Gilles, France
3. Aarhus University, Faculty of Agricultural Sciences, Dep. of Animal Nutrition and Physiology, DK-8830 Tjele, Denmark
4. University of Copenhagen, Department of Basic Animal and Veterinary Sciences, DK-1870 Frederiksberg, Denmark
5. University of Copenhagen, The NNF center for basic metabolic research, Dep. of Biomedical Sciences, DK-2200 Copenhagen, Denmark