1. Animal Production Systems Group, Wageningen University & Research, Wageningen, The Netherlands
2. Food Quality and Design Group, Wageningen University and Research, Wageningen, the Netherlands
3. Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
4. Consultant, ProDairy E.A. Ltd, Nairobi, Kenya
5. International Livestock Research Institute, Nairobi, Kenya
6. Department of Animal Science, Egerton University, Egerton, Kenya