1. Division of Pathology, The Hospital for Sick Children, Toronto, Ontario, Canada
2. Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
3. Canadian Creutzfeldt-Jakob Disease Surveillance System, Public Health Agency of Canada, Ottawa, Canada
4. Division of Pediatric Medicine, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
5. National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
6. Department of Family and Community Medicine, University of Toronto, Toronto, Ontario, Canada
7. Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada
8. Department of Pathology and Laboratory Medicine, University of Ottawa, Ottawa, Canada