1. Division of Pediatric Neurosurgery, Department of Surgery, Sainte-Justine Hospital, Montreal;
2. Departments of Pediatrics and Human Genetics, McGill University and McGill University Health Centre, Montreal;
3. Division of Neurosurgery, Department of Pediatric Surgery, Montreal Children’s Hospital, McGill University Health Centre, Montreal;
4. Departments of Radiology and
5. Pathology, Montreal Children’s Hospital, Montreal; and
6. Departments of Pediatrics and Human Genetics, Montreal Children’s Hospital, McGill University and McGill University Health Centre, Montreal, Quebec, Canada