[1] Univ Sydney, Sch Publ Hlth, Fac Med & Hlth, Sydney, NSW, Australia
[2] Univ Sydney, Paediat & Child Hlth, Med & Hlth, Sydney, NSW, Australia
[3] Univ Sydney, Susan Wakil Sch Nursing & Midwifery, Sydney, NSW, Australia
[4] Natl Ctr Immunisat Res & Surveillance, Sydney, NSW, Australia
[5] Univ Western Australia, Sch Med, Perth, WA, Australia
[6] Telethon Kids Inst, Perth, WA, Australia
[7] Monash Univ, Alfred Hlth, Infect Prevent & Healthcare Epidemiol Unit, Melbourne, Vic, Australia
[8] Monash Univ, Sch Publ Hlth & Prevent Med, Melbourne, Vic, Australia
[9] Univ Queensland, Childrens Hlth Queensland Hosp, Dept Infect Management, Brisbane, Qld, Australia
[10] Univ Queensland, Sch Clin Med, Brisbane, Qld, Australia
[11] Charles Darwin Univ, Menzies Sch Hlth Res, Darwin, NT, Australia
[12] Royal Darwin Hosp, Dept Paediat, Darwin, NT, Australia
[13] Univ Adelaide, Womens & Childrens Hlth Network, Adelaide, SA, Australia
[14] Univ Adelaide, Robinson Res Inst, Adelaide, SA, Australia
[15] Univ Adelaide, Adelaide Med Sch, Adelaide, SA, Australia