[1] Univ New S Wales, Natl Ctr HIV Epidemiol & Clin Res, Sydney, NSW, Australia
[2] Royal Prince Alfred Hosp, RPA Sexual Hlth, Sydney, NSW, Australia
[3] Royal Womens Hosp, Dept Microbiol & Infect Dis, Parkville, Vic, Australia
[4] Sydney Hosp, Sydney Sexual Hlth Ctr, Sydney, NSW, Australia
[5] Univ Melbourne, Dept Obstet & Gynaecol, Melbourne, Vic 3010, Australia