From the National Perinatal Epidemiology and Statistics Unit (G.M.C., S.N.S.), School of Women's and Children's Health and the Centre for Big Data Research in Health, University of New South Wales (UNSW) Sydney; Discipline of Paediatrics (K.A.C., M.A.F.), School of Women's and Children's Health, UNSW Medicine, UNSW Sydney; Department of Neurology (M.A.F.), Sydney Children's Hospital Randwick; Neurosciences Department (A.C.), Queensland Children's Hospital; Department of Neurology (M.P.M.), Children's Hospital at Westmead; University of Sydney (M.P.M.), New South Wales; Neurosciences Research (M.R.), Murdoch Children's Research Institute, Melbourne, Victoria; and Department of Paediatrics (M.R.), University of Melbourne, Parkville, Victoria, Australia.