[1] St Vincents Hosp, Dept Microbiol & Infect Dis, Sydney, NSW 2010, Australia
[2] St Vincents Hosp, HIV Med Unit, Sydney, NSW 2010, Australia
[3] Dept Hlth, AIDS Unit, Hong Kong, Peoples R China
[4] Univ New S Wales, Natl Ctr HIV Epidemiol & Clin Res, Sydney, NSW, Australia
[5] Royal N Shore Hosp, Dept Med, Sydney, NSW, Australia