[1] Royal N Shore Hosp, Dept Haematol, Sydney, NSW, Australia
[2] Royal N Shore Hosp, Dept Microbiol & Infect Dis, Sydney, NSW, Australia
[3] Royal N Shore Hosp, Dept Haematol, St Leonards, NSW, Australia
[4] Univ Sydney, Kolling Inst Med Res, Sydney, NSW 2006, Australia