20Jamison, Dean T, Richard G Feachem, Malegapuru W Makgoba, Eduard R Bos, Florence K Baingana, Karen J Hofman, and Khama O Rogo. Disease and mortality in sub-Saharan Africa.Washington: World Bank Publications, 2006.
24Mathers, Colin D, Christina Bernard, Kim M Iburg, Mie Inoue, Doris Ma Fat, Kenji Shibuya, Claudia Stein, Niels Tomijima, and Hongyi Xu. "Global burden of disease in 2002: data sources, methods and results."(2003) Global Programme on Evidence for Health Policy Discussion Paper.