[1] UNSW Sydney, Viral Hepatitis Clin Res Program, Kirby Inst, Sydney, NSW, Australia
[2] Prince Wales Hosp, Dept Infect Dis, Sydney, NSW, Australia
[3] Johns Hopkins Univ, Sch Med, Div Infect Dis, Baltimore, MD USA
[4] Univ Southern Calif, Div Gastrointestinal & Liver Dis, Los Angeles, CA USA
[5] St Vincents Hosp, Dept Infect Dis, Sydney, NSW, Australia
[6] UNSW Sydney, Kirby Inst, Viral Hepatitis Clin Res Program, Sydney, NSW 2052, Australia