http://www.nhs.uk/Conditions/Syphilis/Pages/Symptomspg.aspx http://www.nhs.uk/Conditions/Syphilis/Pages/Symptomspg.aspx http://www.nhs.uk/Conditions/Syphilis/Pages/Symptomspg.aspx symptoms http://www.nhs.uk/Conditions/Syphilis/Pages/Symptomspg.aspx symptoms NHS Choices 'Syphilis - Symptoms' [accessed 27 October 2015]