1. School of Biological Sciences, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, UK
2. CGIAR Research Programme on Climate Change, Agriculture and Food Security (CCAFS) East Africa, International Livestock Research Institute (ILRI), Nairobi, Kenya
3. CGIAR Research Programme on Climate Change, Agriculture and Food Security (CCAFS) East Africa, International Livestock Research Institute (ILRI), Addis Ababa, Ethiopia
4. CGIAR Research Programme on Climate Change, Agriculture and Food Security (CCAFS) East Africa, Cornell University, Ithaca, NY, USA
5. International Livestock Research Institute (ILRI), Addis Ababa, Ethiopia
6. CGIAR Research Programme on Climate Change, Agriculture and Food Security (CCAFS), University of Vermont, Burlington, VT, USA