[1] Univ New S Wales, Dept Thorac Med, St Vincents Hosp, Sydney, NSW 2010, Australia
[2] Univ New S Wales, Sch Med Sci, Ctr Infect & Inflammat Res, Sydney, NSW 2010, Australia
[3] Univ New S Wales, Fac Med, Prince Wales Clin Sch, Sydney, NSW 2010, Australia
[4] Prince Wales Hosp, Dept Resp Med, Randwick, NSW 2031, Australia
[5] Univ Otago, Dunedin Sch Med, Dept Med, Dunedin, New Zealand