1. Division of Infectious Diseases, Department of Pediatrics, The Hospital for Sick Children, Toronto, Canada;
2. Division of Infectious Diseases, Department of Medicine, St. Joseph's Health Centre, Toronto, Canada;
3. Dalla Lana School of Public Health, University of Toronto, Toronto, Canada;
4. Tropical Disease Unit, Division of Infectious Diseases, Toronto General Hospital, University Health Network, Toronto, Canada;
5. Division of Neurology, Department of Medicine, St. Joseph's Health Centre, Toronto, Canada