1 Department of Medicine, University of British Columbia, Vancouver, BC V5Z1M9, Canada.
2 Department of Pathology and Laboratory Medicine, British Columbia Children's Hospital, Vancouver, BC, Canada.
3 Department of Medicine, University of British Columbia, Vancouver, BC V5Z1M9, Canada; Centre for Health Education Scholarship, University of British Columbia, Vancouver, BC V5Z1M9, Canada. Electronic address: lchen2@bccancer.bc.ca.