Funding for this research was provided by:
Canadian Institutes of Health Research
National Institutes of Health
Michael Smith Foundation for Health Research
St. Paul's Foundation
Received: 19 January 2018
Accepted: 13 March 2018
First Online: 20 March 2018
Ethics approval and consent to participate
: The University of British Columbia/Providence Health Care Research Ethics Board approved the study, and consent to participate was obtained from each participant.
: Not applicable
: The authors declare that they have no competing interests.
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