1. School of Animal and Range Sciences, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia
2. Department of Food Science, University of Copenhagen, Rolighedsvej 30, 1958 Frederiksberg C, Denmark
3. Department of Food Science and Technology, Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana
4. Division for Diet, Disease Prevention and Toxicology, National Food Institute, Technical University of Denmark, 2860 Søborg, Denmark