[1] UNSW Australia, Discipline Paediat, Sch Womens & Childrens Hlth, Fac Med, Randwick, NSW 2031, Australia
[2] Royal Hosp Women, Dept Newborn Care, Sydney, NSW, Australia
[3] Australian Natl Univ, Centenary Hosp, Dept Neonatol, Canberra, ACT 0200, Australia
[4] UNSW Australia, Natl Perinatal Epidemiol & Stat Unit, Ctr Big Data Res Hlth, Randwick, NSW 2031, Australia
[5] UNSW Australia, Sch Womens & Childrens Hlth, Randwick, NSW 2031, Australia
[6] Sydney Childrens Hosp Network, NSW Pregnancy & Newborn Serv Network, Westmead, NSW, Australia
[7] South Eastern Sydney Local Hlth Dist, Publ Hlth Unit, Sydney, NSW, Australia
[8] UNSW Australia, Fac Med, Sch Publ Hlth & Community Med, Randwick, NSW 2031, Australia
[9] Prince Wales Hosp, SEALS Microbiol, Serol & Virol Div, Randwick, NSW 2031, Australia
[10] UNSW Australia, Sch Med Sci, Randwick, NSW 2031, Australia
[11] UNSW Australia, Sch Biotechnol & Bimol Sci, Randwick, NSW 2031, Australia
[12] Princess Margaret Hosp, Perth, WA, Australia
[13] Univ Western Australia, Telethon Kids Inst, Wesfarmers Ctr Vaccines & Infect Dis, Nedlands, WA 6009, Australia
[14] Menzies Sch Hlth Res, Darwin, NT, Australia
[15] Charles Darwin Univ, Darwin, NT 0909, Australia
[16] Sydney Childrens Hosp, Resp Dept, Sydney, NSW, Australia