1. Research Capacity Strengthening, African Population and Health Research Center, Nairobi, Kenya
2. Department of Applied and Technical Biology, Technical University of Kenya, Nairobi, Kenya
3. Department of Community Health and Prevention, Drexel University, Philadelphia & School of Public Health, University of Witwatersrand, Johannesburg, South Africa
4. School of Public Health, University of the Witwatersrand, Johannesburg, South Africa