[1] Royal Childrens Hosp, Murdoch Childrens Res Inst, Ctr Community Child Hlth, Melbourne, Vic 3052, Australia
[2] Univ Melbourne, Melbourne Sch Populat & Global Hlth, Melbourne, Vic 3010, Australia
[3] Univ Melbourne, Dept Paediat, Melbourne, Vic 3010, Australia
[4] Peking Univ, Sch Publ Hlth, Inst Child & Adolescent Hlth, Beijing 100191, Peoples R China
[5] Royal Childrens Hosp, Murdoch Childrens Res Inst, Intergenerat Hlth Res Grp, Melbourne, Vic 3052, Australia
[6] Univ Melbourne, Dept Gen Practice, Melbourne, Vic 3010, Australia