RT Journal Article SR Electronic T1 Introduction to Infectious Disease Modelling JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 21 OP 21 DO 10.1136/sti.2010.046342 VO 87 IS 1 A1 Katy Turner YR 2011 UL http://sti.bmj.com/content/87/1/21.abstract AB