[1] Royal Darwin Hosp, Dept Infect Dis, Darwin, NT, Australia
[2] Royal Darwin Hosp, Terr Pathol, Northern Terr Dept Hlth, Darwin, NT, Australia
[3] Charles Darwin Univ, Menzies Sch Hlth Res, Casuarina, NT, Australia
[4] Southern Hlth & Social Care Trust, Daisy Hill Hosp, Newry, North Ireland
[5] Queens Univ Belfast, Belfast, Antrim, North Ireland
[6] Royal Melbourne Hosp, Victorian Infect Dis Serv, Parkville, Vic, Australia
[7] Univ Melbourne, Peter Doherty Inst Infect & Immun, Melbourne, Vic, Australia