1. Centre for Blood Research & Life Sciences Institute, University of British Columbia, Vancouver, B.C. V6T 1Z3, Canada
2. Department of Chemistry, University of British Columbia, Vancouver, B.C. V6T 1Z1, Canada
3. Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, B.C V6T 1Z7, Canada
4. School of Biomedical Engineering, University of British Columbia, Vancouver, B.C. V6T 2B9, Canada