[1] Sydney Childrens Hosp Network, Dept Paediat Neurol, Sydney, NSW, Australia
[2] UNSW Sydney, UNSW Med & Hlth, Sch Clin Med, Discipline Paediat, Sydney, NSW, Australia
[3] Univ Western Australia, Harry Perkins Inst Med Res, Nedlands, WA, Australia
[4] QEII Med Ctr, Dept Diagnost Genom, PathWest Lab Med, Perth, WA, Australia
[5] Univ Sydney, Fac Med & Hlth, Sydney Med Sch, Discipline Child & Adolescent Hlth, Sydney, NSW, Australia
[6] Childrens Hosp Westmead, TY Nelson Dept Neurol & Neurosurg, Sydney, NSW, Australia
[7] Childrens Hosp Westmead, Kids Neurosci Ctr, Westmead, NSW, Australia
[8] Univ Sydney, Discipline Paediat, Sydney, NSW, Australia
[9] Childrens Hosp Westmead, NSW Newborn Screening Programme, Westmead, NSW, Australia