1. Global burden of maternal and congenital syphilis in 2008 and 2012: a health systems modelling study;Wijesooriya;Lancet Glob Health,2016
2. UNAIDS. Global AIDS Update - 2016. 2016 www.unaids.org/en/resources/documents/2016/Global-AIDS-update-2016 (accessed 13 Oct 2016).
3. Syphilis, still a major cause of infant mortality;Mabey;Lancet Infect Dis,2011
4. HIV: prevention of mother-to-child transmission;Teasdale;BMJ Clin Evid,2011
5. WHO. Global guidance on Criteria and Processes for Validation: elimination of Mother-to-Child Transmission of HIV and Syphilis. 2014 http://apps.who.int/iris/bitstream/10665/112858/1/9789241505888_eng.pdf (accessed 21 Dec 2016).