Prevalence, incidence and predictors of anal Chlamydia trachomatis, anal Neisseria gonorrhoeae and syphilis among older gay and bisexual men in the longitudinal Study for the Prevention of Anal Cancer (SPANC)

Sian Louise Goddard, Isobel M. Poynten, Kathy Petoumenous, Fengyi Jin, Richard J. Hillman, Carmella Law, Jennifer M. Roberts, Christopher K. Fairley, Suzanne M. Garland, Andrew E. Grulich, David J. Templeton, on behalf of the Study for the Prevention of Anal Cancer (SPANC) Research Team