1. US Bureau of the Census. Recent HIV Seroprevalence Levels by Country. Research Note 26. Washington DC: US Bureau of the Census, February 1999.
2. Breastfeeding and HIV-1 infection. A review of current literature;Nduati;Adv Exp Med Biol,2000
3. www.worldbank.org/poverty/data/trends/mort. World Bank Data 2001.
4. Natural history of vertically-acquired HIV-1 infection. The European Collaborative Study. Pediatrics 1994; 94: 815–819.
5. Morbidity among human immunodeficiency virus-1 infected and uninfected African children;Taha;Pediatrics,2000