1. Paediatric Neurology DepartmentChildren's Hospital, London Health Science Centre 800 Commissioners Road East, PO Box 5012, London Ontario Canada N6A 5W9
2. Department of Pediatrics and Child Health, Max Rady College of Medicine, Rady Faculty of Health SciencesUniversity of Manitoba Winnipeg Manitoba Canada
3. Department of NeurologyVirginia Commonwealth University Richmond Virginia USA
4. Department of Paediatrics, Clinical Neurological Sciences and EpidemiologySchulich School of Medicine and Dentistry, Western University London Ontario Canada