[1] Monash Univ, Dept Med, Melbourne, Vic 3004, Australia
[2] Alfred Hosp, Infect Dis Unit, Melbourne, Vic, Australia
[3] Victorian Infect Dis Reference Lab, Melbourne, Vic, Australia
[4] Univ New S Wales, Natl Ctr HIV Epidemiol & Clin Res, Sydney, NSW, Australia
[5] HIV Netherlands Australia Thailand Res Collaborat, Bangkok, Thailand
[6] Johns Hopkins Univ, Div Infect Dis, Baltimore, MD USA