1. Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences (NMBU), Aas, Norway
2. Norwegian Institute of Bioeconomy Research (NIBIO), Division of Food Production and Society, Department of Grassland and Livestock, Tingvoll, Norway
3. School of Agricultural Technology, Food Technology and Nutrition, Technological Educational Institution of Western Macedonia, Florina, Greece