The 2011 National Antenatal Sentinel HIV & syphilus prevalence survey in South Africa, National Department of Health of South Africa http://www.doh.gov.zaArchived 2012-01-03 at the Wayback Machine.
The 2011 National Antenatal Sentinel HIV & syphilus prevalence survey in South Africa, National Department of Health of South Africa http://www.doh.gov.zaArchived 2012-01-03 at the Wayback Machine.