[1] Univ Western Australia, Telethon Inst Child Hlth Res, Ctr Child Hlth Res, Perth, WA 6872, Australia
[2] Univ Sydney, Sch Paediat & Child Hlth, Sydney, NSW 2006, Australia
[3] Childrens Hosp, Western Sydney Genet Program, Westmead, NSW, Australia
[4] Univ Western Australia, Ctr Neuromuscular & Neurol Disorders, Perth, WA 6009, Australia
[5] Univ Wales Coll Med, Inst Med Genet, Cardiff CF4 4XN, S Glam, Wales
[6] Curtin Univ Technol, Perth, WA 6001, Australia
[7] Kurume Univ, Sch Med, Dept Pediat & Child Hlth, Kurume, Fukuoka 830, Japan
[8] Ehime Univ, Sch Med, Dept Hyg, Matsuyama, Ehime 790, Japan