1 Division of Infectious Diseases, Department of Pediatrics, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada.
2 Division of General Pediatrics, Department of Pediatrics, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada.
3 Department of Pathology and Laboratory Medicine, British Columbia Children's Hospital, Vancouver, British Columbia, Canada.
4 Division of Neurosurgery, Department of Surgery, British Columbia Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada.
5 Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada.
6 Department of Radiology, British Columbia Children's Hospital, Vancouver, British Columbia, Canada.