Opt-Out and Opt-In Testing Increases Syphilis Screening of HIV-Positive Men Who Have Sex with Men in Australia

Rebecca Guy, Carol El-Hayek, Christopher K Fairley, Handan Wand, Andrew Carr, Anna McNulty, Jenny Hoy, Christopher Bourne, John McAllister, BK Tee, David Baker, Norman Roth, Mark Stoove, Marcus Chen