RT Journal Article SR Electronic(1) A1 Noll-Hussong, M YR 2012 T1 Syphilis and the Internet JF Eurosurveillance VO 17 IS 33 SP 20249 OP DO https://doi.org/10.2807/ese.17.33.20249-en UL https://www.eurosurveillance.org/content/10.2807/ese.17.33.20249-en