A 10-year-old girl with a fluctuating level of consciousness, ataxia and slurred speech

Affiliations

• ¹ Department of Paediatrics, Hospital for Sick Children, Toronto, Ontario.
• ² Department of Paediatrics, Division of Clinical and Metabolic Genetics, Hospital for Sick Children, Toronto, Ontario, University of Toronto, Toronto, Ontario.
• ³ Department of Paediatrics, Division of Paediatric Medicine and the Paediatric Outcomes Research Team, Hospital for Sick Children, Toronto, Ontario, University of Toronto, Toronto, Ontario.