1. Department of Food and Resource Economics; University of Copenhagen; Rolighedsvej 25, Frederiksberg C. 1958 Copenhagen Denmark
2. Department of Large Animal Sciences; University of Copenhagen; Grønnegårdsvej 8, Frederiksberg C. 1870 Copenhagen Denmark
3. Department of Veterinary Clinical and Animal Sciences; University Hospital for Companion Animals, University of Copenhagen; Dyrlaegevej 16, Frederiksberg C. 1870 Copenhagen Denmark