1. Cutts F, Olive J-M. Vaccination programmes in developing countries. In: Plotkin S, Orenstein W, editors. Vaccines. Philadelphia: Saunders Co.; 1999. p. 1047–73.
2. GAVI. Immunize Every Child: GAVI Strategy for Sustainable Immunization Services. Available at www.vaccinealliance.org. [accessed 13 July 2002].
3. World Bank, World Development Report 1993. Investing in Health. Oxford: Oxford University Press; 1993.
4. World Bank, World Development Report 2000. Oxford: Oxford University Press; 2000.
5. Vryheid RE, Kane MA, Muller N, Schatz GC, Bezabeh. Infant and adolescent hepatitis B immunization up to 1999: a global overview. Vaccine 2001;19:1026–37.