1. Centre for Biotechnology and Bioinformatics, University of Nairobi, Nairobi, Kenya
2. Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, National Laboratory for HIV Immunology, J C Wilt Infectious Diseases Research Centre, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
3. Department of Medical Microbiology, University of Nairobi, Nairobi, Kenya