1. Division of Neurology, Department of Pediatrics, The Hospital for Sick Children, Toronto‚ Ontario‚ Canada (R.C., G.d., N.D., D.M., E.P., M.M.).
2. Division of Neuroradiology, Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto‚ Ontario‚ Canada (P.K.).
3. Child Health Evaluative Sciences Program, Hospital for Sick Children Research Institute‚ Toronto‚ Ontario‚ Canada (G.d.).