1 Children's Hospital of Eastern Ontario Research Institute, Department of Pediatrics, University of Ottawa, Ottawa, ON, Canada.
2 The Hospital for Sick Children, Department of Pediatrics, University of Toronto, Toronto, ON, Canada.
3 Department of Pediatrics, Epidemiology and Clinical Neurological Sciences, Schulich School of Medicine, Children's Hospital Western Ontario, University of Western, London, ON, Canada.
4 Département de pédiatrie de l'Université Laval, Centre hospitalier Mère-Enfant-Soleil, Quebec, QC, Canada.
5 Cumming School of Medicine, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada.
6 Department of Pediatrics, Health Sciences Centre, Winnipeg, MB, Canada.
7 Department of Pediatrics, Jim Pattison Children's Hospital, Saskatoon, SK, Canada.
8 Department of Pediatrics, Stollery Children's Hospital and Glenrose Rehabilitation Hospital, University of Alberta, Edmonton, AB, Canada.
9 Division of Developmental Pediatrics, Department of Pediatrics, Holland Bloorview Kids Rehabilitation Hospital, University of Toronto, Toronto, ON, Canada.
10 Département de pédiatrie de l'Université de Montréal, Centre hospitalier Universitaire Sainte-Justine, Montréal, QC, Canada.
11 Departments of Pediatrics and Department of Neurology and Neurosurgery, McGill University, Montréal, QC, Canada.
12 Centre for Outcomes Research and Evaluation, Research Institute of the McGill University Health Centre, Montréal, QC, Canada.
13 IWK Health, Department of Pediatrics and Medicine, Dalhousie University, Halifax, NS, Canada.
14 McMaster Children's Hospital, McMaster University Medical Center, Hamilton, ON, Canada.
15 Division of Neurology, Department of Pediatrics, BC Children's Hospital, University of British Columbia, Vancouver, BC, Canada.