P Weston1, D Taranath2, J Liebelt3, N Smith4. 1. Department of Neurology and Clinical Neurophysiology, Women's & Children's Hospital, North Adelaide, SA, 5006, Australia. pfweston@yahoo.com. 2. Department of Ophthalmology, Flinders Medical Centre, Bedford Park South, 5042, Australia. 3. Medical Geneticist, South Australian Clinical Genetics Service, Women's & Children's Hospital, North Adelaide, SA, 5006, Australia. 4. Department of Neurology and Clinical Neurophysiology, Women's & Children's Hospital, North Adelaide, SA, 5006, Australia.