1. Department of Radiology, Christchurch Hospital, Christchurch, New Zealand
2. Department of Pediatrics, Hôpital Bon-Secours, Metz, France
3. Canterbury Child Development Research Group, University of Canterbury, Christchurch, New Zealand
4. Departments of Pediatrics, Neurology, and Radiology, St Louis Children's Hospital, Washington University, St Louis, Missouri