1. Department of Pediatrics (Neurology), The Hospital for Sick Children, Toronto, Ontario, Canada
2. Department of Pediatrics (Neurology), University of Toronto, Toronto, Ontario, Canada
3. Department of Pediatrics (Neonatology), University Hospital Puerta del Mar, Cadiz, Spain
4. British Columbia Children's Hospital Research Institute, Vancouver, British Columbia, Canada
5. Department of Pediatrics (Neonatology), University of British Columbia, British Columbia Women's Hospital and Health Centre, Vancouver, British Columbia, Canada
6. Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada