1. Tea Breeding and Genetics Improvement, Kenya Agriculture and Livestock Research Organization-Tea Research Institute, P. O Box 820-20200, Kericho, Kenya
2. Department of Biochemistry and Molecular Biology, Egerton University, P.O Box 536, Njoro-Nakuru, Kenya
3. Department of Epidemiology of Microbial Diseases, Yale School of Public Health, 60 College St., New Haven, CT 06510, USA
4. International Livestock Research Institute- Bioscience East and Central Africa, P.O Box 30709, Nairobi, Kenya
5. Association for Strengthening Agricultural Research in Eastern and Central Africa, P.O Box 765, Entebbe, Uganda