[1] Univ New S Wales, St Vincents Med Ctr, Natl Ctr HIV Epidemiol & Clin Res, Sydney, NSW, Australia
[2] Univ New S Wales, Sch Publ Hlth & Community Med, Sydney, NSW, Australia
[3] Univ Sydney, Cent Clin Sch, Sydney Med Sch, Sydney, NSW 2006, Australia
[4] Univ New S Wales, S Western Sydney Area Hlth Serv, Sydney, NSW, Australia
[5] Univ New S Wales, Fac Med, Sydney, NSW, Australia