1. Ainsworth M, Teokul W. 2000. Breaking the silence: setting realistic priorities for AIDS control in less-developed countries. The Lancet365: 55–60.
2. Booysen F, van Rensburg D, Bachmann M, Engelbrecht M, Steyn F. 2002. The socio-economic impact of HIV/AIDS on households in South Africa – the results of a study in Welkom and Qwa Qwa, Free State Province. AIDS Bulletin11 (1). Available at: [http://www.mrc.ac.za/aids/march2002/economic.htm].
3. Buchacz K, Patel P, Taylor M et al. 2004. Syphilis increases HIV viral load and decreases CD4 cell counts in HIV-infected patients with new syphilis infections. AIDS18: 2075–9.
4. Braddock M. 1995. The potential of a voucher system to improve the quality, efficiency and equity of health services and control sexually transmitted diseases. Cost Study Part I: Average and marginal costs in the public, NGO and private sectors, and recommended voucher prices. Report prepared for the Liverpool School of Hygiene and Tropical Medicine, UK and the Instituto Centro Americano de Salud, Nicaragua.
5. Bratt JH, Suazo M, Santo H. 1993. Costs of family planning services delivered through ASHONPLAFA programs: final report. Research Triangle Park, NC: Family Health International.