1. Global HIV/AIDS response. Epidemic update and health sector progress towards universal access. Geneva: World Health Organization; 2011. Available at: (http://www.afro.who.int/en/clusters-a-programmes/dpc/acquired-immune-deficiency-syndrome/features/3439-global-hivaids-response-progress-report-2011.html.). Accessed on 17 November 2014.
2. Gomez G, Kamb M, Newman L, Mark J, Broutet N, Hawkes S. Untreated maternal syphilis and adverse outcomes of pregnancy: a systematic review and meta-analysis. Bull World Health Organ. 2013;91:217–26. doi:10.2471/BLT.12.107623.
3. Newman L, Kamb M, Hawkes S, Gomez G, Say L, Seuc A, et al. Global estimates of syphilis in pregnancy and associated adverse outcomes: analysis of multinational antenatal surveillance data. PLoS Med. 2013;10:e1001396.
4. Saloojee H, Velaphi S, Goga Y, Afadapa N, Steen R, Lincetto O. The prevention and management of congenital syphilis: an overview and recommendations. Bull World Health Organ. 2004;82:424–30.
5. World Health Organization. Global Elimination of Syphilis: rationale and strategy for action. Geneva, Switzerland; 2007. Available at: (http://www.who.int/reproductivehealth/publications/rtis/9789241595858/en/). Accessed on 17 November 2014.