1. Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
2. Biomedical Engineering Program, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
3. Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
4. Department of Radiology, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
5. Division of Emergency Medicine, University of Washington, Seattle, WA 98195, USA.
6. Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
7. Division of Global Health and Human Rights, Department of Emergency Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.