[1] Deakin Univ, Deakin Populat Hlth Strateg Res Ctr, Deakin Hlth Econ, Burwood, Vic 3125, Australia
[2] Royal Childrens Hosp, Ctr Community Child Hlth, Melbourne, Vic, Australia
[3] Royal Childrens Hosp, Murdoch Childrens Res Inst, Melbourne, Vic, Australia
[4] Australian Hearing, Natl Acoust Labs, Chatswood, NSW, Australia
[5] Univ Melbourne, Hearing Cooperat Res Ctr, Parkville, Vic 3052, Australia
[6] Univ Melbourne, Melbourne Grad Sch Educ, Parkville, Vic 3052, Australia
[7] Univ Melbourne, Dept Paediat, Parkville, Vic 3052, Australia