1. World Health Organization, Department of Measurement and Health Information. Projections of mortality and burden of disease by region, 2006. (n.d.). Available: http://www.who.int/healthinfo/statistics/bod_deathbyregion.xls. Accessed 8 December 2011.
2. The burden and costs of chronic diseases in low-income and middle-income countries;DO Abegunde;Lancet,2007
3. Non-Communicable Diseases in Sub-Saharan Africa: The Case for Cohort Studies;MD Holmes;PLoS Med,2010
4. Clinical Laboratory Improvement Amendments (CLIA) (n.d.). Available: http://wwwn.cdc.gov/clia/default.aspx. Accessed 2011 Dec 9.
5. ISO - International Organization for Standardization, ISO - International Organization for Standardization (n.d.) ISO - International Organization for Standardization. Available: http://www.iso.org/iso/iso_catalogue/management_and_leadership_standards/quality_management.htm. Accessed 2010 Oct 26.