1. Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada;
2. Forensic Science Center, British Columbia Institute of Technology, Burnaby, British Columbia, Canada;
3. Department of Chemistry, British Columbia Institute of Technology, Burnaby, British Columbia, Canada;
4. Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada;
5. Department of Chemistry, University of Waterloo Mass Spectrometry Facility, Waterloo, Ontario, Canada