[1] Childrens Hosp Westmead, Natl Ctr Immunisat Res & Surveillance, Westmead, NSW, Australia
[2] Hunter New England Local Hlth Dist, Sydney, NSW, Australia
[3] Univ Newcastle, Callaghan, NSW 2308, Australia
[4] Illawarra Med Ctr, Subiaco, WA, Australia
[5] Western Australia Dept Hlth, Communicable Dis Control Directorate, Subiaco, WA, Australia
[6] Univ Western Australia, Sch Pathol & Lab Med, Nedlands, WA 6009, Australia
[7] Univ Western Australia, Wesfarmers Ctr Vaccines & Infect Dis, Telethon Kids Inst, Nedlands, WA 6009, Australia
[8] Australian Natl Univ, Natl Ctr Epidemiol & Populat Hlth, Res Sch Populat Hlth, Canberra, ACT 0200, Australia
[9] Princess Margaret Hosp, Subiaco, WA, Australia
[10] Univ Western Australia, Sch Paediat & Child Hlth, Princess Margaret Hosp, Nedlands, WA 6009, Australia
[11] Royal Childrens Hosp, Dept Gen Med, Melbourne, Vic, Australia
[12] Murdoch Childrens Res Inst, SAEFVIC, Melbourne, Vic, Australia
[13] Univ Melbourne, Dept Paediat, Melbourne, Vic 3010, Australia
[14] Univ Sydney, Discipline Paediat & Child Hlth, Sydney, NSW 2006, Australia
[15] Childrens Hosp Westmead, Dept Microbiol & Infect Dis, Westmead, NSW, Australia