1 International Livestock Research Institute (ILRI) and Centre for Tropical Livestock Genetics and Health, P.O. Box 30709, Nairobi 00100, Kenya. Electronic address: [email protected].
2 The Roslin Institute and Centre for Tropical Livestock Genetics and Health, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom.
3 International Livestock Research Institute (ILRI) and Centre for Tropical Livestock Genetics and Health, P.O. Box 30709, Nairobi 00100, Kenya.
4 Ribeirão Preto College of Nursing, University of Sao Paulo, Avenida dos Bandeirantes, 3900, 14040-902 Ribeirao Preto, Brazil.
5 The University of Nairobi, Department of Public Health, Pharmacology and Toxicology, P.O Box 30197-00100, Nairobi, Kenya.